<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with WebFilings-->
<linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <roleRef roleURI="http://www.brandywinerealty.com/role/BeneficiariesEquityOfParentCompany" xlink:href="bdn-20120331.xsd#BeneficiariesEquityOfParentCompany" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/BeneficiariesEquityOfParentCompanyDetails" xlink:href="bdn-20120331.xsd#BeneficiariesEquityOfParentCompanyDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/BeneficiariesEquityOfParentCompanyDetailstextuals" xlink:href="bdn-20120331.xsd#BeneficiariesEquityOfParentCompanyDetailstextuals" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/BeneficiariesEquityOfParentCompanyTables" xlink:href="bdn-20120331.xsd#BeneficiariesEquityOfParentCompanyTables" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/CommitmentsAndContingencies" xlink:href="bdn-20120331.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/CommitmentsAndContingenciesDetails" xlink:href="bdn-20120331.xsd#CommitmentsAndContingenciesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/CommitmentsAndContingenciesGroundRentDetails" xlink:href="bdn-20120331.xsd#CommitmentsAndContingenciesGroundRentDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/CommitmentsAndContingenciesTables" xlink:href="bdn-20120331.xsd#CommitmentsAndContingenciesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/ConsolidatedBalanceSheets" xlink:href="bdn-20120331.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/ConsolidatedBalanceSheetsCalc2" xlink:href="bdn-20120331.xsd#ConsolidatedBalanceSheetsCalc2" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="bdn-20120331.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/ConsolidatedStatementsOfBeneficiariesEquity" xlink:href="bdn-20120331.xsd#ConsolidatedStatementsOfBeneficiariesEquity" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/ConsolidatedStatementsOfBeneficiariesEquityParenthetical" xlink:href="bdn-20120331.xsd#ConsolidatedStatementsOfBeneficiariesEquityParenthetical" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="bdn-20120331.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/ConsolidatedStatementsOfCashFlowsParenthetical" xlink:href="bdn-20120331.xsd#ConsolidatedStatementsOfCashFlowsParenthetical" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:href="bdn-20120331.xsd#ConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/ConsolidatedStatementsOfOperations" xlink:href="bdn-20120331.xsd#ConsolidatedStatementsOfOperations" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DebtObligations" xlink:href="bdn-20120331.xsd#DebtObligations" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DebtObligationsAggregateScheduledPrincipalPaymentsOfDebtObligationExcludingAmortizationOfDiscountsAndPremiumsDetails" xlink:href="bdn-20120331.xsd#DebtObligationsAggregateScheduledPrincipalPaymentsOfDebtObligationExcludingAmortizationOfDiscountsAndPremiumsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DebtObligationsConsolidatedDebtObligationsOutstandingDetails" xlink:href="bdn-20120331.xsd#DebtObligationsConsolidatedDebtObligationsOutstandingDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DebtObligationsDetailsTextuals" xlink:href="bdn-20120331.xsd#DebtObligationsDetailsTextuals" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DebtObligationsDetailsTextuals2" xlink:href="bdn-20120331.xsd#DebtObligationsDetailsTextuals2" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DebtObligationsOutstandingUnsecuredNotesInSeriesOfTransactionsDetails" xlink:href="bdn-20120331.xsd#DebtObligationsOutstandingUnsecuredNotesInSeriesOfTransactionsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DebtObligationsTables" xlink:href="bdn-20120331.xsd#DebtObligationsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DeferredCosts" xlink:href="bdn-20120331.xsd#DeferredCosts" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DeferredCostsDetails" xlink:href="bdn-20120331.xsd#DeferredCostsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DeferredCostsDetailsCalc2" xlink:href="bdn-20120331.xsd#DeferredCostsDetailsCalc2" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DeferredCostsDetailsTextuals" xlink:href="bdn-20120331.xsd#DeferredCostsDetailsTextuals" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DeferredCostsTables" xlink:href="bdn-20120331.xsd#DeferredCostsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DiscontinuedOperations" xlink:href="bdn-20120331.xsd#DiscontinuedOperations" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DiscontinuedOperationsDetails" xlink:href="bdn-20120331.xsd#DiscontinuedOperationsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DiscontinuedOperationsTables" xlink:href="bdn-20120331.xsd#DiscontinuedOperationsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/DocumentAndEntityInformation" xlink:href="bdn-20120331.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/FairValueOfFinancialInstruments" xlink:href="bdn-20120331.xsd#FairValueOfFinancialInstruments" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/FairValueOfFinancialInstrumentsDetails" xlink:href="bdn-20120331.xsd#FairValueOfFinancialInstrumentsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/FairValueOfFinancialInstrumentsDetailsTextuals" xlink:href="bdn-20120331.xsd#FairValueOfFinancialInstrumentsDetailsTextuals" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/FairValueOfFinancialInstrumentsTables" xlink:href="bdn-20120331.xsd#FairValueOfFinancialInstrumentsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/IntangibleAssets" xlink:href="bdn-20120331.xsd#IntangibleAssets" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/IntangibleAssetsDetails" xlink:href="bdn-20120331.xsd#IntangibleAssetsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/IntangibleAssetsDetails1" xlink:href="bdn-20120331.xsd#IntangibleAssetsDetails1" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/IntangibleAssetsTables" xlink:href="bdn-20120331.xsd#IntangibleAssetsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/InvestmentInUnconsolidatedVentures" xlink:href="bdn-20120331.xsd#InvestmentInUnconsolidatedVentures" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/InvestmentInUnconsolidatedVenturesFinancialPositionOfUnconsolidatedRealEstateVenturesDetails" xlink:href="bdn-20120331.xsd#InvestmentInUnconsolidatedVenturesFinancialPositionOfUnconsolidatedRealEstateVenturesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/InvestmentInUnconsolidatedVenturesNarrativeDetails" xlink:href="bdn-20120331.xsd#InvestmentInUnconsolidatedVenturesNarrativeDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/InvestmentInUnconsolidatedVenturesSummaryOfResultsOfOperationsOfUnconsolidatedRealEstateVenturesDetails" xlink:href="bdn-20120331.xsd#InvestmentInUnconsolidatedVenturesSummaryOfResultsOfOperationsOfUnconsolidatedRealEstateVenturesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/InvestmentInUnconsolidatedVenturesTables" xlink:href="bdn-20120331.xsd#InvestmentInUnconsolidatedVenturesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/NonControllingInterestsInParentCompany" xlink:href="bdn-20120331.xsd#NonControllingInterestsInParentCompany" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/NonControllingInterestsInParentCompanyNonContollingInterestsInParentCompanyDetails" xlink:href="bdn-20120331.xsd#NonControllingInterestsInParentCompanyNonContollingInterestsInParentCompanyDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/OrganizationOfParentCompanyAndOperatingPartnership" xlink:href="bdn-20120331.xsd#OrganizationOfParentCompanyAndOperatingPartnership" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/OrganizationOfParentCompanyAndOperatingPartnershipDetails" xlink:href="bdn-20120331.xsd#OrganizationOfParentCompanyAndOperatingPartnershipDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/PartnersEquityOfOperatingPartnership" xlink:href="bdn-20120331.xsd#PartnersEquityOfOperatingPartnership" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/PartnersEquityOfOperatingPartnershipDetails" xlink:href="bdn-20120331.xsd#PartnersEquityOfOperatingPartnershipDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/PartnersEquityOfOperatingPartnershipDetailstextuals" xlink:href="bdn-20120331.xsd#PartnersEquityOfOperatingPartnershipDetailstextuals" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/PartnersEquityOfOperatingPartnershipTables" xlink:href="bdn-20120331.xsd#PartnersEquityOfOperatingPartnershipTables" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/RealEstateInvestments" xlink:href="bdn-20120331.xsd#RealEstateInvestments" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/RealEstateInvestmentsAcquisitionsAndDispositionsDetails" xlink:href="bdn-20120331.xsd#RealEstateInvestmentsAcquisitionsAndDispositionsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/RealEstateInvestmentsGrossCarryingValueOfCompanysPropertiesDetails" xlink:href="bdn-20120331.xsd#RealEstateInvestmentsGrossCarryingValueOfCompanysPropertiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/RealEstateInvestmentsTables" xlink:href="bdn-20120331.xsd#RealEstateInvestmentsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/RiskManagementAndUseOfFinancialInstruments" xlink:href="bdn-20120331.xsd#RiskManagementAndUseOfFinancialInstruments" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/RiskManagementAndUseOfFinancialInstrumentsDetails" xlink:href="bdn-20120331.xsd#RiskManagementAndUseOfFinancialInstrumentsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/RiskManagementAndUseOfFinancialInstrumentsFairValuesOfDerivativeFinancialInstrumentsDetails" xlink:href="bdn-20120331.xsd#RiskManagementAndUseOfFinancialInstrumentsFairValuesOfDerivativeFinancialInstrumentsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/RiskManagementAndUseOfFinancialInstrumentsTables" xlink:href="bdn-20120331.xsd#RiskManagementAndUseOfFinancialInstrumentsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/SegmentInformation" xlink:href="bdn-20120331.xsd#SegmentInformation" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/SegmentInformationDetails" xlink:href="bdn-20120331.xsd#SegmentInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/SegmentInformationDetails1" xlink:href="bdn-20120331.xsd#SegmentInformationDetails1" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/SegmentInformationTables" xlink:href="bdn-20120331.xsd#SegmentInformationTables" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/ShareBasedAndDeferredCompensation" xlink:href="bdn-20120331.xsd#ShareBasedAndDeferredCompensation" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/ShareBasedAndDeferredCompensationDetailsTextuals" xlink:href="bdn-20120331.xsd#ShareBasedAndDeferredCompensationDetailsTextuals" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/ShareBasedAndDeferredCompensationOptionActivityDetails" xlink:href="bdn-20120331.xsd#ShareBasedAndDeferredCompensationOptionActivityDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/ShareBasedAndDeferredCompensationRestrictedShareActivityDetails" xlink:href="bdn-20120331.xsd#ShareBasedAndDeferredCompensationRestrictedShareActivityDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/ShareBasedAndDeferredCompensationTables" xlink:href="bdn-20120331.xsd#ShareBasedAndDeferredCompensationTables" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/SubsequentEvents" xlink:href="bdn-20120331.xsd#SubsequentEvents" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/SubsequentEventsDetails" xlink:href="bdn-20120331.xsd#SubsequentEventsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="bdn-20120331.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/SummaryOfSignificantAccountingPoliciesFairValueMeasurementsDetails" xlink:href="bdn-20120331.xsd#SummaryOfSignificantAccountingPoliciesFairValueMeasurementsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/SummaryOfSignificantAccountingPoliciesHeldToMaturitySecuritiesDetails" xlink:href="bdn-20120331.xsd#SummaryOfSignificantAccountingPoliciesHeldToMaturitySecuritiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/SummaryOfSignificantAccountingPoliciesNarrativeDetails" xlink:href="bdn-20120331.xsd#SummaryOfSignificantAccountingPoliciesNarrativeDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/SummaryOfSignificantAccountingPoliciesNotesReceivableDetails" xlink:href="bdn-20120331.xsd#SummaryOfSignificantAccountingPoliciesNotesReceivableDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="bdn-20120331.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:href="bdn-20120331.xsd#SummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/TaxCreditTransactions" xlink:href="bdn-20120331.xsd#TaxCreditTransactions" xlink:type="simple" />
  <roleRef roleURI="http://www.brandywinerealty.com/role/TaxCreditTransactionsDetails" xlink:href="bdn-20120331.xsd#TaxCreditTransactionsDetails" xlink:type="simple" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/BeneficiariesEquityOfParentCompany" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/BeneficiariesEquityOfParentCompanyDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_f0affe56-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="bdn-20120331.xsd#bdn_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic" xlink:label="loc_bdn_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic_eb3bab60-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_f0affe56-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic_eb3bab60-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_ecdf6c30-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic_eb3bab60-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_ecdf6c30-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest_05ebd466-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic_eb3bab60-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest_05ebd466-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity_05e7fbd4-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_f0affe56-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity_05e7fbd4-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity_05e7fbd4-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DividendsPreferredStock" xlink:label="loc_us-gaap_DividendsPreferredStock_04c52aba-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity_05e7fbd4-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DividendsPreferredStock_04c52aba-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_AmountAllocatedToUnvestedRestrictedShareholders" xlink:label="loc_bdn_AmountAllocatedToUnvestedRestrictedShareholders_eaf4950e-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity_05e7fbd4-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_AmountAllocatedToUnvestedRestrictedShareholders_eaf4950e-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_NetLossIncomeFromContinuingOperationsAttributableToNonControllingInterestsBasic" xlink:label="loc_bdn_NetLossIncomeFromContinuingOperationsAttributableToNonControllingInterestsBasic_e93081a6-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity_05e7fbd4-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_NetLossIncomeFromContinuingOperationsAttributableToNonControllingInterestsBasic_e93081a6-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_0463b780-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="bdn-20120331.xsd#bdn_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersDiluted" xlink:label="loc_bdn_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersDiluted_ebbfcce2-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_0463b780-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersDiluted_ebbfcce2-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_IncomeLossFromDiscontinuedOperationsDiluted" xlink:label="loc_bdn_IncomeLossFromDiscontinuedOperationsDiluted_ea55b4b6-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersDiluted_ebbfcce2-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_bdn_IncomeLossFromDiscontinuedOperationsDiluted_ea55b4b6-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNonControllingInterestDiluted" xlink:label="loc_bdn_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNonControllingInterestDiluted_eaa8a96e-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersDiluted_ebbfcce2-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_bdn_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNonControllingInterestDiluted_eaa8a96e-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_LossFromContinuingOperationsAvailableToCommonUnitholdersDiluted" xlink:label="loc_bdn_LossFromContinuingOperationsAvailableToCommonUnitholdersDiluted_eaaaa160-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_0463b780-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_LossFromContinuingOperationsAvailableToCommonUnitholdersDiluted_eaaaa160-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNonControllingInterestDiluted" xlink:label="loc_bdn_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNonControllingInterestDiluted_eb0877c2-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_LossFromContinuingOperationsAvailableToCommonUnitholdersDiluted_eaaaa160-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_bdn_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNonControllingInterestDiluted_eb0877c2-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_PreferredStockDividendsDiluted" xlink:label="loc_bdn_PreferredStockDividendsDiluted_ea6b66da-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_LossFromContinuingOperationsAvailableToCommonUnitholdersDiluted_eaaaa160-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_bdn_PreferredStockDividendsDiluted_ea6b66da-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_AmountAllocatedToUnvestedRestrictedShareholdersDiluted" xlink:label="loc_bdn_AmountAllocatedToUnvestedRestrictedShareholdersDiluted_eb349712-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_LossFromContinuingOperationsAvailableToCommonUnitholdersDiluted_eaaaa160-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_bdn_AmountAllocatedToUnvestedRestrictedShareholdersDiluted_eb349712-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_NetLossIncomeFromContinuingOperationsAttributableToNonControllingInterestsDiluted" xlink:label="loc_bdn_NetLossIncomeFromContinuingOperationsAttributableToNonControllingInterestsDiluted_e92adb84-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_LossFromContinuingOperationsAvailableToCommonUnitholdersDiluted_eaaaa160-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_bdn_NetLossIncomeFromContinuingOperationsAttributableToNonControllingInterestsDiluted_e92adb84-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/BeneficiariesEquityOfParentCompanyDetailstextuals" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/BeneficiariesEquityOfParentCompanyTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/CommitmentsAndContingencies" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/CommitmentsAndContingenciesDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/CommitmentsAndContingenciesGroundRentDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/CommitmentsAndContingenciesTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_fa7db8f6-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="bdn-20120331.xsd#bdn_RealEstateInvestmentsNet" xlink:label="loc_bdn_RealEstateInvestmentsNet_ea69b6f0-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_fa7db8f6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_RealEstateInvestmentsNet_ea69b6f0-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateInvestmentPropertyNet" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyNet_f4d9910e-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_RealEstateInvestmentsNet_ea69b6f0-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyNet_f4d9910e-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateInvestmentPropertyAtCost" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAtCost_f4d91c88-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyNet_f4d9910e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyAtCost_f4d91c88-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_e2d254aa-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyNet_f4d9910e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_e2d254aa-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DevelopmentInProcess" xlink:label="loc_us-gaap_DevelopmentInProcess_e945dc8a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_RealEstateInvestmentsNet_ea69b6f0-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_DevelopmentInProcess_e945dc8a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LandAvailableForDevelopment" xlink:label="loc_us-gaap_LandAvailableForDevelopment_eea943a6-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_RealEstateInvestmentsNet_ea69b6f0-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_LandAvailableForDevelopment_eea943a6-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_e5378c74-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_fa7db8f6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_e5378c74-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_HeldToMaturitySecurities" xlink:label="loc_us-gaap_HeldToMaturitySecurities_f0226d70-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_fa7db8f6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_HeldToMaturitySecurities_f0226d70-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNet" xlink:label="loc_us-gaap_AccountsReceivableNet_e2781436-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_fa7db8f6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_AccountsReceivableNet_e2781436-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredRentReceivablesNet" xlink:label="loc_us-gaap_DeferredRentReceivablesNet_e785ec0a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_fa7db8f6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DeferredRentReceivablesNet_e785ec0a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestments" xlink:label="loc_us-gaap_EquityMethodInvestments_eb290e8c-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_fa7db8f6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_EquityMethodInvestments_eb290e8c-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredCosts" xlink:label="loc_us-gaap_DeferredCosts_e77ecd4e-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_fa7db8f6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DeferredCosts_e77ecd4e-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_edd1cd86-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_fa7db8f6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_edd1cd86-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NotesReceivableNet" xlink:label="loc_us-gaap_NotesReceivableNet_f143fbe2-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_fa7db8f6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_NotesReceivableNet_f143fbe2-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssets" xlink:label="loc_us-gaap_OtherAssets_0973d714-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_fa7db8f6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_OtherAssets_0973d714-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_06160e84-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_00bf81f4-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_06160e84-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_StockholdersEquity_00bf81f4-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_013e5e20-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_00bf81f4-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_PreferredStockValue_013e5e20-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GeneralPartnersCapitalAccount" xlink:label="loc_us-gaap_GeneralPartnersCapitalAccount_ec72f1d6-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_00bf81f4-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_GeneralPartnersCapitalAccount_ec72f1d6-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_e2cdfc7a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_00bf81f4-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_e2cdfc7a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterest" xlink:label="loc_us-gaap_MinorityInterest_f05708b4-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_06160e84-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_MinorityInterest_f05708b4-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_eed459d8-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_eed459d8-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_StockholdersEquity_00bf81f4-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_eec8615a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_eed459d8-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_Liabilities_eec8615a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SecuredDebt" xlink:label="loc_us-gaap_SecuredDebt_f71fc596-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_eec8615a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_SecuredDebt_f71fc596-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_ef3b2d48-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_eec8615a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_LineOfCredit_ef3b2d48-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnsecuredDebt" xlink:label="loc_us-gaap_UnsecuredDebt_f9492d8a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_eec8615a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_UnsecuredDebt_f9492d8a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SeniorNotes" xlink:label="loc_us-gaap_SeniorNotes_fd9f3906-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_eec8615a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_SeniorNotes_fd9f3906-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_07a87c8c-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_eec8615a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_07a87c8c-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:label="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_07b52482-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_eec8615a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_07b52482-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_DeferredIncomeGainsAndRent" xlink:label="loc_bdn_DeferredIncomeGainsAndRent_eb09c438-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_eec8615a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_DeferredIncomeGainsAndRent_eb09c438-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OffMarketLeaseUnfavorable" xlink:label="loc_us-gaap_OffMarketLeaseUnfavorable_01cd33c0-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_eec8615a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_OffMarketLeaseUnfavorable_01cd33c0-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilities" xlink:label="loc_us-gaap_OtherLiabilities_f20d4092-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_eec8615a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_OtherLiabilities_f20d4092-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_eed459d8-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_MinorityInterest_f05708b4-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TemporaryEquityRedemptionValue" xlink:label="loc_us-gaap_TemporaryEquityRedemptionValue_fd9af1ac-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_eed459d8-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_TemporaryEquityRedemptionValue_fd9af1ac-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/ConsolidatedBalanceSheetsCalc2" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/ConsolidatedStatementsOfBeneficiariesEquity" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/ConsolidatedStatementsOfBeneficiariesEquityParenthetical" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_f0b133d4-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f0848d20-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_f0b133d4-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f0848d20-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:label="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_f3ebef12-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f0848d20-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_f3ebef12-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfLongTermLinesOfCredit" xlink:label="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_f56f62d8-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f0848d20-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_f56f62d8-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfSecuredDebt" xlink:label="loc_us-gaap_RepaymentsOfSecuredDebt_f59e04f8-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f0848d20-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_RepaymentsOfSecuredDebt_f59e04f8-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfNotesPayable" xlink:label="loc_us-gaap_RepaymentsOfNotesPayable_f570d8d4-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f0848d20-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_RepaymentsOfNotesPayable_f570d8d4-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfUnsecuredDebt" xlink:label="loc_us-gaap_RepaymentsOfUnsecuredDebt_f5a0537a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f0848d20-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_RepaymentsOfUnsecuredDebt_f5a0537a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsForProceedsFromHedgeFinancingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromHedgeFinancingActivities_f095ebe2-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f0848d20-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_PaymentsForProceedsFromHedgeFinancingActivities_f095ebe2-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsOfFinancingCosts" xlink:label="loc_us-gaap_PaymentsOfFinancingCosts_eba342d8-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f0848d20-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_PaymentsOfFinancingCosts_eba342d8-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_f3de7e68-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f0848d20-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_f3de7e68-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="loc_us-gaap_PaymentsOfDividends_f2822b46-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="9" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f0848d20-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_PaymentsOfDividends_f2822b46-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsOfDividendsMinorityInterest" xlink:label="loc_us-gaap_PaymentsOfDividendsMinorityInterest_f282d578-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="10" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f0848d20-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_PaymentsOfDividendsMinorityInterest_f282d578-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromIssuanceOfUnsecuredDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfUnsecuredDebt_f432eade-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="11" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f0848d20-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfUnsecuredDebt_f432eade-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction" xlink:label="loc_us-gaap_DebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction_fe705a86-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="12" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f0848d20-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction_fe705a86-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_f085995e-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_f0b133d4-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_f085995e-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireRealEstate" xlink:label="loc_us-gaap_PaymentsToAcquireRealEstate_f4a5d10c-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_f085995e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_PaymentsToAcquireRealEstate_f4a5d10c-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireHeldToMaturitySecurities" xlink:label="loc_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_f4886a68-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_f085995e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_f4886a68-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_f40b02da-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_f085995e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_f40b02da-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireAndDevelopRealEstate" xlink:label="loc_us-gaap_PaymentsToAcquireAndDevelopRealEstate_f485dec4-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_f085995e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_PaymentsToAcquireAndDevelopRealEstate_f485dec4-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_AdvancesToTenantForPurchaseOfTenantAssets" xlink:label="loc_bdn_AdvancesToTenantForPurchaseOfTenantAssets_eb35fc38-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_f085995e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_AdvancesToTenantForPurchaseOfTenantAssets_eb35fc38-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_LoanProvidedToRealEstateVenturePartner" xlink:label="loc_bdn_LoanProvidedToRealEstateVenturePartner_ebcb710a-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_f085995e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_LoanProvidedToRealEstateVenturePartner_ebcb710a-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireEquityMethodInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireEquityMethodInvestments_f486e6c0-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_f085995e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_PaymentsToAcquireEquityMethodInvestments_f486e6c0-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentDividendsOrDistributions" xlink:label="loc_us-gaap_EquityMethodInvestmentDividendsOrDistributions_e35453ba-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_f085995e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_EquityMethodInvestmentDividendsOrDistributions_e35453ba-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsForLeasingCostsCommissionsAndTenantImprovements" xlink:label="loc_us-gaap_PaymentsForLeasingCostsCommissionsAndTenantImprovements_0db19078-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="9" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_f085995e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_PaymentsForLeasingCostsCommissionsAndTenantImprovements_0db19078-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_f0b133d4-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_05aaf4d2-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_ProfitLoss_05aaf4d2-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_05f0f9dc-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_05f0f9dc-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_e3ed8ecc-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_e3ed8ecc-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:label="loc_us-gaap_AmortizationOfDebtDiscountPremium_e4ab0d1c-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_AmortizationOfDebtDiscountPremium_e4ab0d1c-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_StraightLineRent" xlink:label="loc_bdn_StraightLineRent_ead522e6-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_StraightLineRent_ead522e6-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_AcquiredAboveBelowMarketLeasesNet" xlink:label="loc_bdn_AcquiredAboveBelowMarketLeasesNet_ea71be54-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_AcquiredAboveBelowMarketLeasesNet_ea71be54-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_StraightLineGroundRentExpense" xlink:label="loc_bdn_StraightLineGroundRentExpense_eaad41cc-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_StraightLineGroundRentExpense_eaad41cc-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_f43ffe9a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_f43ffe9a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_fc01e558-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="9" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_fc01e558-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainLossOnSaleOfProperties" xlink:label="loc_us-gaap_GainLossOnSaleOfProperties_e3882ec4-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="10" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_GainLossOnSaleOfProperties_e3882ec4-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_ec62243c-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="11" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_ec62243c-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_e5a3a9a4-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="12" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_e5a3a9a4-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_ed9e60f4-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="13" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_ed9e60f4-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_e5a2f2ca-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="14" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_e5a2f2ca-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_IncreaseDecreaseInDeferredIncomeGainsAndRents" xlink:label="loc_bdn_IncreaseDecreaseInDeferredIncomeGainsAndRents_eade87a0-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="15" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_IncreaseDecreaseInDeferredIncomeGainsAndRents_eade87a0-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_ff60b206-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="16" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_ff60b206-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_AmortizationOfStockCompensationCosts" xlink:label="loc_bdn_AmortizationOfStockCompensationCosts_46c72a9c-8fb8-11e1-ba93-1231380dc193" xlink:type="locator" />
    <calculationArc order="17" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_AmortizationOfStockCompensationCosts_46c72a9c-8fb8-11e1-ba93-1231380dc193" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredCharges" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredCharges_e5a996ac-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="18" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredCharges_e5a996ac-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockOptionPlanExpense" xlink:label="loc_us-gaap_StockOptionPlanExpense_e38d7884-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="19" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_f0868ac6-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_StockOptionPlanExpense_e38d7884-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/ConsolidatedStatementsOfCashFlowsParenthetical" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_e63cc850-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0613007c-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_e63cc850-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0613007c-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_05aaf4d2-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0613007c-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_ProfitLoss_05aaf4d2-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease_f1d30b98-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0613007c-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease_f1d30b98-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_f1df70b8-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease_f1d30b98-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_f1df70b8-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax_f1dae03e-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease_f1d30b98-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax_f1dae03e-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_06132da4-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_e63cc850-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_06132da4-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/ConsolidatedStatementsOfOperations" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_e4a43500-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_ecdf2450-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EarningsPerShareBasic_e4a43500-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_ecdf2450-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare_ece04556-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EarningsPerShareBasic_e4a43500-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare_ece04556-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_05ab7ee8-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest_05ebd466-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_05ab7ee8-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest_05ebd466-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterestInNetIncomeLossLimitedPartnerships" xlink:label="loc_us-gaap_MinorityInterestInNetIncomeLossLimitedPartnerships_ece2b994-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_05ab7ee8-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_MinorityInterestInNetIncomeLossLimitedPartnerships_ece2b994-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_f1959cb8-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_OperatingIncomeLoss_f1959cb8-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateRevenueNet" xlink:label="loc_us-gaap_RealEstateRevenueNet_f4d9c7aa-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_f1959cb8-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_RealEstateRevenueNet_f4d9c7aa-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesIncomeStatementMinimumLeaseRevenue" xlink:label="loc_us-gaap_OperatingLeasesIncomeStatementMinimumLeaseRevenue_f19141fe-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateRevenueNet_f4d9c7aa-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_OperatingLeasesIncomeStatementMinimumLeaseRevenue_f19141fe-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TenantReimbursements" xlink:label="loc_us-gaap_TenantReimbursements_f6486a9c-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateRevenueNet_f4d9c7aa-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_TenantReimbursements_f6486a9c-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainLossOnContractTermination" xlink:label="loc_us-gaap_GainLossOnContractTermination_04744eba-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateRevenueNet_f4d9c7aa-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_GainLossOnContractTermination_04744eba-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ManagementFeesRevenue" xlink:label="loc_us-gaap_ManagementFeesRevenue_f6315ab4-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateRevenueNet_f4d9c7aa-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_ManagementFeesRevenue_f6315ab4-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherRealEstateRevenue" xlink:label="loc_us-gaap_OtherRealEstateRevenue_f23667f6-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateRevenueNet_f4d9c7aa-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_OtherRealEstateRevenue_f23667f6-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_ff41c85a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_f1959cb8-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_OperatingExpenses_ff41c85a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment" xlink:label="loc_us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment_e6d6bf5a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_ff41c85a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DirectCostsOfLeasedAndRentedPropertyOrEquipment_e6d6bf5a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateTaxExpense" xlink:label="loc_us-gaap_RealEstateTaxExpense_e6df2f0a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_ff41c85a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_RealEstateTaxExpense_e6df2f0a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ServiceManagementCosts" xlink:label="loc_us-gaap_ServiceManagementCosts_e6e43360-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_ff41c85a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_ServiceManagementCosts_e6e43360-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_e83bd45c-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_ff41c85a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DepreciationAndAmortization_e83bd45c-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_ec692278-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_ff41c85a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_ec692278-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_fac497c6-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_InvestmentIncomeInterest_fac497c6-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_ede3c4f0-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_InterestExpense_ede3c4f0-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_e3ed8ecc-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_e3ed8ecc-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpenseDebt" xlink:label="loc_us-gaap_InterestExpenseDebt_ede6bde0-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_InterestExpenseDebt_ede6bde0-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_ea0b7a8a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_ea0b7a8a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainsLossesOnSalesOfInvestmentRealEstate" xlink:label="loc_us-gaap_GainsLossesOnSalesOfInvestmentRealEstate_07a485f0-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_GainsLossesOnSalesOfInvestmentRealEstate_07a485f0-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_ec62243c-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_ec62243c-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_ecdf6c30-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_e9bba46a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_ecdf6c30-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_e9bba46a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_e9bb744a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_ecdf6c30-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_e9bb744a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_e9525b2c-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_ecdee88c-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EarningsPerShareDiluted_e9525b2c-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_ecdee88c-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare_ece00992-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EarningsPerShareDiluted_e9525b2c-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare_ece00992-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_f0affe56-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_f0af6c2a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_f0affe56-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_NetIncomeLoss_f0af6c2a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_ecde5e44-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_f0af6c2a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperations_ecde5e44-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_05e9d8f0-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_f0af6c2a-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_05e9d8f0-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DividendsPreferredStock" xlink:label="loc_us-gaap_DividendsPreferredStock_04c52aba-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_f0affe56-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DividendsPreferredStock_04c52aba-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_AmountAllocatedToUnvestedRestrictedShareholders" xlink:label="loc_bdn_AmountAllocatedToUnvestedRestrictedShareholders_eaf4950e-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_f0affe56-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_AmountAllocatedToUnvestedRestrictedShareholders_eaf4950e-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DebtObligations" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DebtObligationsAggregateScheduledPrincipalPaymentsOfDebtObligationExcludingAmortizationOfDiscountsAndPremiumsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_efc8f358-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="bdn-20120331.xsd#bdn_LongTermDebtMaturitiesRepaymentsOfPrincipal" xlink:label="loc_bdn_LongTermDebtMaturitiesRepaymentsOfPrincipal_ea6a0cd6-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_efc8f358-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_LongTermDebtMaturitiesRepaymentsOfPrincipal_ea6a0cd6-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_efc50df6-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_LongTermDebtMaturitiesRepaymentsOfPrincipal_ea6a0cd6-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_efc50df6-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_efc5e3d4-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_LongTermDebtMaturitiesRepaymentsOfPrincipal_ea6a0cd6-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_efc5e3d4-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_efc5ac2a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_LongTermDebtMaturitiesRepaymentsOfPrincipal_ea6a0cd6-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_efc5ac2a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_efc56f1c-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_LongTermDebtMaturitiesRepaymentsOfPrincipal_ea6a0cd6-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_efc56f1c-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_efc53dbc-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_LongTermDebtMaturitiesRepaymentsOfPrincipal_ea6a0cd6-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_efc53dbc-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_efc4de80-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_LongTermDebtMaturitiesRepaymentsOfPrincipal_ea6a0cd6-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_efc4de80-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_06f01872-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_efc8f358-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_06f01872-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DebtObligationsConsolidatedDebtObligationsOutstandingDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_efc8f358-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SecuredDebt" xlink:label="loc_us-gaap_SecuredDebt_f71fc596-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_efc8f358-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_SecuredDebt_f71fc596-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_e74fdab6-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_SecuredDebt_f71fc596-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_e74fdab6-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_06f01872-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_SecuredDebt_f71fc596-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_06f01872-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_UnsecuredIndebtedness" xlink:label="loc_bdn_UnsecuredIndebtedness_e9313ee8-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_efc8f358-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_UnsecuredIndebtedness_e9313ee8-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_UnsecuredIndebtedness_e9313ee8-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_e74fdab6-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_UnsecuredIndebtedness_e9313ee8-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_06f01872-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DebtObligationsDetailsTextuals" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DebtObligationsDetailsTextuals2" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DebtObligationsOutstandingUnsecuredNotesInSeriesOfTransactionsDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DebtObligationsTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DeferredCosts" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DeferredCostsDetails" xlink:type="extended">
    <loc xlink:href="bdn-20120331.xsd#bdn_DeferredCostsAccumulatedAmortization" xlink:label="loc_bdn_DeferredCostsAccumulatedAmortization_ea6b1090-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredCostsLeasingAccumulatedAmortization" xlink:label="loc_us-gaap_DeferredCostsLeasingAccumulatedAmortization_042935ce-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_DeferredCostsAccumulatedAmortization_ea6b1090-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_DeferredCostsLeasingAccumulatedAmortization_042935ce-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedAmortizationDeferredFinanceCosts" xlink:label="loc_us-gaap_AccumulatedAmortizationDeferredFinanceCosts_0427cc52-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_DeferredCostsAccumulatedAmortization_ea6b1090-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_AccumulatedAmortizationDeferredFinanceCosts_0427cc52-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_DeferredCostsGross" xlink:label="loc_bdn_DeferredCostsGross_eaab9d4a-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredCostsLeasingGross" xlink:label="loc_us-gaap_DeferredCostsLeasingGross_0428b7a2-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_DeferredCostsGross_eaab9d4a-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_DeferredCostsLeasingGross_0428b7a2-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredFinanceCostsGross" xlink:label="loc_us-gaap_DeferredFinanceCostsGross_04276050-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_DeferredCostsGross_eaab9d4a-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_DeferredFinanceCostsGross_04276050-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredCosts" xlink:label="loc_us-gaap_DeferredCosts_e77ecd4e-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredCostsLeasingNet" xlink:label="loc_us-gaap_DeferredCostsLeasingNet_01b4bdc2-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredCosts_e77ecd4e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DeferredCostsLeasingNet_01b4bdc2-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredCostsLeasingNet_01b4bdc2-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DeferredCostsLeasingGross_0428b7a2-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredCostsLeasingNet_01b4bdc2-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DeferredCostsLeasingAccumulatedAmortization_042935ce-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_fe9f9a08-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredCosts_e77ecd4e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_fe9f9a08-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredFinanceCostsNet_fe9f9a08-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DeferredFinanceCostsGross_04276050-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredFinanceCostsNet_fe9f9a08-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_AccumulatedAmortizationDeferredFinanceCosts_0427cc52-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DeferredCostsDetailsCalc2" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredCosts" xlink:label="loc_us-gaap_DeferredCosts_3446F2A002C83F99E82298726846627A_e77ecd4e-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="bdn-20120331.xsd#bdn_DeferredCostsGross" xlink:label="loc_bdn_DeferredCostsGross_3446F2A002C83F99E82298726846627A_eaab9d4a-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredCosts_3446F2A002C83F99E82298726846627A_e77ecd4e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_DeferredCostsGross_3446F2A002C83F99E82298726846627A_eaab9d4a-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_DeferredCostsAccumulatedAmortization" xlink:label="loc_bdn_DeferredCostsAccumulatedAmortization_3446F2A002C83F99E82298726846627A_ea6b1090-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredCosts_3446F2A002C83F99E82298726846627A_e77ecd4e-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_DeferredCostsAccumulatedAmortization_3446F2A002C83F99E82298726846627A_ea6b1090-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DeferredCostsDetailsTextuals" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DeferredCostsTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DiscontinuedOperations" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DiscontinuedOperationsDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DiscontinuedOperationsTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/DocumentAndEntityInformation" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/FairValueOfFinancialInstruments" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/FairValueOfFinancialInstrumentsDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/FairValueOfFinancialInstrumentsDetailsTextuals" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/FairValueOfFinancialInstrumentsTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/IntangibleAssets" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/IntangibleAssetsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_edd1cd86-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_edd0f4f6-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_edd1cd86-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_edd0f4f6-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_e2cbd8dc-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_edd1cd86-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_e2cbd8dc-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/IntangibleAssetsDetails1" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpense" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpense_eba7bac0-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearOne" xlink:label="loc_us-gaap_FutureAmortizationExpenseYearOne_ec1ea068-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpense_eba7bac0-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_FutureAmortizationExpenseYearOne_ec1ea068-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FutureAmortizationExpenseYearTwo_ec2018e4-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpense_eba7bac0-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_FutureAmortizationExpenseYearTwo_ec2018e4-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FutureAmortizationExpenseYearThree_ec1f5d28-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpense_eba7bac0-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_FutureAmortizationExpenseYearThree_ec1f5d28-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FutureAmortizationExpenseYearFour_ec1e00e0-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpense_eba7bac0-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_FutureAmortizationExpenseYearFour_ec1e00e0-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FutureAmortizationExpenseYearFive_ec1d63d8-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpense_eba7bac0-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_FutureAmortizationExpenseYearFive_ec1d63d8-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FutureAmortizationExpenseAfterYearFive" xlink:label="loc_us-gaap_FutureAmortizationExpenseAfterYearFive_08fa3c6a-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpense_eba7bac0-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_FutureAmortizationExpenseAfterYearFive_08fa3c6a-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/IntangibleAssetsTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/InvestmentInUnconsolidatedVentures" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/InvestmentInUnconsolidatedVenturesFinancialPositionOfUnconsolidatedRealEstateVenturesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestments" xlink:label="loc_us-gaap_EquityMethodInvestments_eb290e8c-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/InvestmentInUnconsolidatedVenturesNarrativeDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/InvestmentInUnconsolidatedVenturesSummaryOfResultsOfOperationsOfUnconsolidatedRealEstateVenturesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss" xlink:label="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_f93e2688-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue" xlink:label="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue_0d4e2e98-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_f93e2688-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue_0d4e2e98-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses" xlink:label="loc_bdn_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses_eaf107c2-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_f93e2688-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_EquityMethodInvestmentSummarizedFinancialInformationOperatingExpenses_eaf107c2-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_EquityMethodInvestmentSummarizedFinancialInformationInterestExpenseNet" xlink:label="loc_bdn_EquityMethodInvestmentSummarizedFinancialInformationInterestExpenseNet_eaadea50-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_f93e2688-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_EquityMethodInvestmentSummarizedFinancialInformationInterestExpenseNet_eaadea50-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization" xlink:label="loc_bdn_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization_e8330774-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_f93e2688-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization_e8330774-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/InvestmentInUnconsolidatedVenturesTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/NonControllingInterestsInParentCompany" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/NonControllingInterestsInParentCompanyNonContollingInterestsInParentCompanyDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/OrganizationOfParentCompanyAndOperatingPartnership" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/OrganizationOfParentCompanyAndOperatingPartnershipDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/PartnersEquityOfOperatingPartnership" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/PartnersEquityOfOperatingPartnershipDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_f0affe56-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="bdn-20120331.xsd#bdn_IncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic" xlink:label="loc_bdn_IncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic_eac662a6-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_f0affe56-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_IncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic_eac662a6-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_IncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic_eac662a6-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_AmountAllocatedToUnvestedRestrictedShareholders" xlink:label="loc_bdn_AmountAllocatedToUnvestedRestrictedShareholders_eaf4950e-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_IncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic_eac662a6-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_bdn_AmountAllocatedToUnvestedRestrictedShareholders_eaf4950e-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DividendsPreferredStock" xlink:label="loc_us-gaap_DividendsPreferredStock_04c52aba-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_IncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic_eac662a6-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_us-gaap_DividendsPreferredStock_04c52aba-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_ecdf6c30-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_f0affe56-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_ecdf6c30-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_0463b780-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="bdn-20120331.xsd#bdn_IncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted" xlink:label="loc_bdn_IncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted_eaee9122-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_0463b780-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_IncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted_eaee9122-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNonControllingInterestDiluted" xlink:label="loc_bdn_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNonControllingInterestDiluted_eb0877c2-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_IncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted_eaee9122-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_bdn_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNonControllingInterestDiluted_eb0877c2-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_AmountAllocatedToUnvestedRestrictedShareholdersDiluted" xlink:label="loc_bdn_AmountAllocatedToUnvestedRestrictedShareholdersDiluted_eb349712-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_IncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted_eaee9122-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_bdn_AmountAllocatedToUnvestedRestrictedShareholdersDiluted_eb349712-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_PreferredStockDividendsDiluted" xlink:label="loc_bdn_PreferredStockDividendsDiluted_ea6b66da-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_IncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted_eaee9122-2a47-11e1-9b0a-12313d14f921" xlink:to="loc_bdn_PreferredStockDividendsDiluted_ea6b66da-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_IncomeLossFromDiscontinuedOperationsNetOfTaxDiluted" xlink:label="loc_bdn_IncomeLossFromDiscontinuedOperationsNetOfTaxDiluted_eac3cdc0-2a47-11e1-9b0a-12313d14f921" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_0463b780-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_IncomeLossFromDiscontinuedOperationsNetOfTaxDiluted_eac3cdc0-2a47-11e1-9b0a-12313d14f921" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/PartnersEquityOfOperatingPartnershipDetailstextuals" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/PartnersEquityOfOperatingPartnershipTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/RealEstateInvestments" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/RealEstateInvestmentsAcquisitionsAndDispositionsDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/RealEstateInvestmentsGrossCarryingValueOfCompanysPropertiesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateInvestmentPropertyAtCost" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAtCost_f4d91c88-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Land" xlink:label="loc_us-gaap_Land_eea8da10-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyAtCost_f4d91c88-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_Land_eea8da10-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BuildingsAndImprovementsGross" xlink:label="loc_us-gaap_BuildingsAndImprovementsGross_e4b24bd6-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyAtCost_f4d91c88-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_BuildingsAndImprovementsGross_e4b24bd6-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LeaseholdImprovementsGross" xlink:label="loc_us-gaap_LeaseholdImprovementsGross_eeb049c6-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyAtCost_f4d91c88-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_LeaseholdImprovementsGross_eeb049c6-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/RealEstateInvestmentsTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/RiskManagementAndUseOfFinancialInstruments" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/RiskManagementAndUseOfFinancialInstrumentsDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/RiskManagementAndUseOfFinancialInstrumentsFairValuesOfDerivativeFinancialInstrumentsDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/RiskManagementAndUseOfFinancialInstrumentsTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/SegmentInformation" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/SegmentInformationDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_ec7be2aa-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateRevenueNet" xlink:label="loc_us-gaap_RealEstateRevenueNet_f4d9c7aa-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_ec7be2aa-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_RealEstateRevenueNet_f4d9c7aa-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_e6cc9390-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_ec7be2aa-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_e6cc9390-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/SegmentInformationDetails1" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_05aaf4d2-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_05aaf4d2-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_ec7be2aa-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_GrossProfit_ec7be2aa-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_ede3c4f0-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_InterestExpense_ede3c4f0-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_e3ed8ecc-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_e3ed8ecc-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_e83bd45c-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_DepreciationAndAmortization_e83bd45c-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_ec692278-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_ec692278-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_fac497c6-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_InvestmentIncomeInterest_fac497c6-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_ea0b7a8a-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_ea0b7a8a-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainsLossesOnSalesOfInvestmentRealEstate" xlink:label="loc_us-gaap_GainsLossesOnSalesOfInvestmentRealEstate_07a485f0-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_GainsLossesOnSalesOfInvestmentRealEstate_07a485f0-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_ec62243c-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_ec62243c-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpenseDebt" xlink:label="loc_us-gaap_InterestExpenseDebt_ede6bde0-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="10" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_05e5deee-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_InterestExpenseDebt_ede6bde0-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_ecdf6c30-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_05aaf4d2-2586-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_ecdf6c30-2585-11e0-bc05-7b821c07cce9" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/SegmentInformationTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/ShareBasedAndDeferredCompensation" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/ShareBasedAndDeferredCompensationDetailsTextuals" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/ShareBasedAndDeferredCompensationOptionActivityDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/ShareBasedAndDeferredCompensationRestrictedShareActivityDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/ShareBasedAndDeferredCompensationTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/SubsequentEvents" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/SubsequentEventsDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/SummaryOfSignificantAccountingPolicies" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/SummaryOfSignificantAccountingPoliciesFairValueMeasurementsDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/SummaryOfSignificantAccountingPoliciesHeldToMaturitySecuritiesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_HeldToMaturitySecurities" xlink:label="loc_us-gaap_HeldToMaturitySecurities_f0226d70-2585-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmount" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmount_0139f66e-2586-11e0-bc05-7b821c07cce9" xlink:type="locator" />
    <calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecurities_f0226d70-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmount_0139f66e-2586-11e0-bc05-7b821c07cce9" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_HeldToMaturitySecuritiesPremiumPaid" xlink:label="loc_bdn_HeldToMaturitySecuritiesPremiumPaid_be341840-8fab-11e1-ba93-1231380dc193" xlink:type="locator" />
    <calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecurities_f0226d70-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_HeldToMaturitySecuritiesPremiumPaid_be341840-8fab-11e1-ba93-1231380dc193" xlink:type="arc" />
    <loc xlink:href="bdn-20120331.xsd#bdn_HeldToMaturitySecuritiesAmortizationOfPremiums" xlink:label="loc_bdn_HeldToMaturitySecuritiesAmortizationOfPremiums_c84e01f0-8fac-11e1-ba93-1231380dc193" xlink:type="locator" />
    <calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecurities_f0226d70-2585-11e0-bc05-7b821c07cce9" xlink:to="loc_bdn_HeldToMaturitySecuritiesAmortizationOfPremiums_c84e01f0-8fac-11e1-ba93-1231380dc193" xlink:type="arc" />
  </calculationLink>
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/SummaryOfSignificantAccountingPoliciesNarrativeDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/SummaryOfSignificantAccountingPoliciesNotesReceivableDetails" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/TaxCreditTransactions" xlink:type="extended" />
  <calculationLink xlink:role="http://www.brandywinerealty.com/role/TaxCreditTransactionsDetails" xlink:type="extended" />
</linkbase>
