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        <link:definition>0151 - Statement - Consolidated Statements of Cash Flows (Unaudited) (Parenthetical)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://brandywinerealty.com/role/DocumentAndEntityInformation" id="DocumentAndEntityInformation">
        <link:definition>00 - Document - Document and Entity Information</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>0141 - Statement - Consolidated Statements of Beneficiaries' Equity (Unaudited) (Parenthetical)</link:definition>
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        <link:definition>0110 - Statement - Consolidated Balance Sheets</link:definition>
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      <link:roleType roleURI="http://brandywinerealty.com/role/StatementsOfCashFlows" id="StatementsOfCashFlows">
        <link:definition>0150 - Statement - Consolidated Statements of Cash Flows (Unaudited)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>0111 - Statement - Consolidated Balance Sheets (Parenthetical)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://brandywinerealty.com/role/StatementsOfEquity" id="StatementsOfEquity">
        <link:definition>0140 - Statement - Consolidated Statements of Beneficiaries' Equity (Unaudited)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://brandywinerealty.com/role/StatementsOfOtherComprehensiveIncome" id="StatementsOfOtherComprehensiveIncome">
        <link:definition>0130 - Statement - Consolidated Statements of Comprehensive Income (Unaudited)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://brandywinerealty.com/role/StatementsOfOperations" id="StatementsOfOperations">
        <link:definition>0120 - Statement - Consolidated Statements of Operations (Unaudited)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>0209 - Disclosure - Risk Management and Use of Financial Instruments</link:definition>
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        <link:definition>0208 - Disclosure - Fair Value of Financial Instruments</link:definition>
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        <link:definition>0207 - Disclosure - Debt Obligations</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>0206 - Disclosure - Intangible Assets</link:definition>
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        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>0205 - Disclosure - Deferred Costs</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>0204 - Disclosure - Investment in Unconsolidated Ventures</link:definition>
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        <link:definition>0203 - Disclosure - Real Estate Investments</link:definition>
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  <element id="bdn_NumberOfRealEstateVenturesThatOwnsBuildings" name="NumberOfRealEstateVenturesThatOwnsBuildings" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
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  <element id="bdn_NumberOfRoomsContainInOneRealEstateVentureDevelopedAsHotelProperty" name="NumberOfRoomsContainInOneRealEstateVentureDevelopedAsHotelProperty" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
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  <element id="bdn_AreaOwnedByRealEstateVentureOfUndevelopedParcelOfLand" name="AreaOwnedByRealEstateVentureOfUndevelopedParcelOfLand" type="us-types:areaItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
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  <element id="bdn_CommonStockInGrantorTrustMember" name="CommonStockInGrantorTrustMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="bdn_ConcordAirportPlazaMember" name="ConcordAirportPlazaMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="bdn_IrsPhiladelphiaCampusMember" name="IrsPhiladelphiaCampusMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_CiraSouthGarageMember" name="CiraSouthGarageMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="bdn_EmployeeSharePurchasePlanMember" name="EmployeeSharePurchasePlanMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="bdn_ContributionAllocatedInNonControllingInterest" name="ContributionAllocatedInNonControllingInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_RateOfReturnOnNoncontrollingInterest" name="RateOfReturnOnNoncontrollingInterest" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_CommitmentsAndContingenciesTablesAbstract" name="CommitmentsAndContingenciesTablesAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_CommitmentsAndContingenciesDetailsAbstract" name="CommitmentsAndContingenciesDetailsAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_CommitmentsAndContingenciesTextualsAbstract" name="CommitmentsAndContingenciesTextualsAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_SubsequentEventsDetailsAbstract" name="SubsequentEventsDetailsAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_SubsequentEventsTextualsAbstract" name="SubsequentEventsTextualsAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_PrepaidMortgageDebtWithoutPenalty" name="PrepaidMortgageDebtWithoutPenalty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="bdn_IfCompanyTakesFeeTitleToTwoLoganSquareUponForeclosureOfItsMortgageCompanyHasAgreedToPayUnaffiliatedThirdPartyThatHoldsResidualInterestInFeeOwnerOfThisProperty" name="IfCompanyTakesFeeTitleToTwoLoganSquareUponForeclosureOfItsMortgageCompanyHasAgreedToPayUnaffiliatedThirdPartyThatHoldsResidualInterestInFeeOwnerOfThisProperty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_CompanyAgreedNotToSellAcquiredPropertiesUpToPeriod" name="CompanyAgreedNotToSellAcquiredPropertiesUpToPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_TaxCreditTransactionsAxis" name="TaxCreditTransactionsAxis" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_TaxCreditTransactionsDomain" name="TaxCreditTransactionsDomain" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_AgreedContributionInProjectCost" name="AgreedContributionInProjectCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_USBMember" name="USBMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_AmountToBeReceivedForProjectCost" name="AmountToBeReceivedForProjectCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_AccretionOfNonControllingInterestLiability" name="AccretionOfNonControllingInterestLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_ExpectedBenefitFromQualifiedProgram" name="ExpectedBenefitFromQualifiedProgram" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionActivityAbstract" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionActivityAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionActivityTextBlock" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionActivityTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodAggregateIntrinsicValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodAggregateIntrinsicValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
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  <element id="bdn_ShareBasedCompensationArrangementByShareBasedPaymentStockOptionsNonvestedNumber" name="ShareBasedCompensationArrangementByShareBasedPaymentStockOptionsNonvestedNumber" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_ShareBasedCompensationArrangementByShareBasedPaymentAwardTermsOfPurchaseCommonShares" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardTermsOfPurchaseCommonShares" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_ShareBasedCompensationArrangementMaximumContributionsByPlanParticipants" name="ShareBasedCompensationArrangementMaximumContributionsByPlanParticipants" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationDecrementalCompensationCost" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationDecrementalCompensationCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="bdn_AreaOfIrsCampusBuilding" name="AreaOfIrsCampusBuilding" type="us-types:areaItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_PercentageOfBuildingLeasedToIrs" name="PercentageOfBuildingLeasedToIrs" type="us-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_SummaryOfSignificantAccountingPoliciesTablesAbstract" name="SummaryOfSignificantAccountingPoliciesTablesAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_SummaryOfSignificantAccountingPoliciesDetails" name="SummaryOfSignificantAccountingPoliciesDetails" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="bdn_SummaryOfSignificantAccountingPoliciesTextualsAbstract" name="SummaryOfSignificantAccountingPoliciesTextualsAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="bdn_RevenueIncreasedByStraightLineRentAdjustment" name="RevenueIncreasedByStraightLineRentAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
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  <element id="bdn_MinimumPercentageOfTaxableIncomeRequiredToBeDistributedToShareholdersInOrderToContinueToQualifyAsReit" name="MinimumPercentageOfTaxableIncomeRequiredToBeDistributedToShareholdersInOrderToContinueToQualifyAsReit" type="us-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="bdn_RevenueAndExpenseInformationForPropertyClassifiedAsDiscontinuedOperationsTextBlock" name="RevenueAndExpenseInformationForPropertyClassifiedAsDiscontinuedOperationsTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="bdn_DevelopmentExpenseForLand" name="DevelopmentExpenseForLand" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="bdn_IncreasedRevenueDueToAmortizationOfDeferredRent" name="IncreasedRevenueDueToAmortizationOfDeferredRent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
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  <element id="bdn_IncreaseInSharesDueToAmendmentsInPlan" name="IncreaseInSharesDueToAmendmentsInPlan" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_IncreaseInSharesDueToAmendmentsInPlanSharesSolelyAvailableForOptionsAndShareAppreciationRights" name="IncreaseInSharesDueToAmendmentsInPlanSharesSolelyAvailableForOptionsAndShareAppreciationRights" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
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  <element id="bdn_DividendPaidForSeriesCPreferredShares" name="DividendPaidForSeriesCPreferredShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
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  <element id="bdn_PreferentialReturnForSeriesD" name="PreferentialReturnForSeriesD" type="us-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="bdn_PartnersEquityOfOperatingPartnershipDetailsAbstract" name="PartnersEquityOfOperatingPartnershipDetailsAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="bdn_EarningsPerCommonPartnershipUnitLineItems" name="EarningsPerCommonPartnershipUnitLineItems" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="bdn_LossFromContinuingOperationsAvailableToCommonUnitholdersDiluted" name="LossFromContinuingOperationsAvailableToCommonUnitholdersDiluted" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="bdn_PartnersEquityOfOperatingPartnershipTextualsAbstract" name="PartnersEquityOfOperatingPartnershipTextualsAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="bdn_DividendRate" name="DividendRate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_IncomeLossFromDiscontinuedOperationsDiluted" name="IncomeLossFromDiscontinuedOperationsDiluted" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="bdn_AverageSalesPricePerShare" name="AverageSalesPricePerShare" type="us-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="bdn_PhiladelphiaCbdMember" name="PhiladelphiaCbdMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_MetropolitanDcMember" name="MetropolitanDcMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_NewJerseyDelawareMember" name="NewJerseyDelawareMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_RichmondVirginiaMember" name="RichmondVirginiaMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_AustinTexasMember" name="AustinTexasMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_CaliforniaMember" name="CaliforniaMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_CorporateMember" name="CorporateMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="bdn_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNonControllingInterestDiluted" name="IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNonControllingInterestDiluted" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="bdn_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic" name="IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="bdn_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersDiluted" name="IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersDiluted" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
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  <element id="bdn_WeightedAverageSharesOutstandingDiluted" name="WeightedAverageSharesOutstandingDiluted" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_AntiDilutiveRedeemableLimitedPartnershipUnits" name="AntiDilutiveRedeemableLimitedPartnershipUnits" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_DividendDeclaredPerCommonShare" name="DividendDeclaredPerCommonShare" type="us-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_AmountOfDividendDeclared" name="AmountOfDividendDeclared" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="bdn_MaximumPercentageOfGrossSalePricePerShareCompensationToSalesAgents" name="MaximumPercentageOfGrossSalePricePerShareCompensationToSalesAgents" type="us-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_CommonPartnershipUnitsIssuedToParentCompany" name="CommonPartnershipUnitsIssuedToParentCompany" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_AdditionalSharesExpectedToBePurchasedUnderProgram" name="AdditionalSharesExpectedToBePurchasedUnderProgram" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_IncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic" name="IncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="bdn_IncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted" name="IncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="bdn_IncomeLossFromDiscontinuedOperationsNetOfTaxDiluted" name="IncomeLossFromDiscontinuedOperationsNetOfTaxDiluted" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="bdn_DistributionDeclaredPerCommonPartnershipUnit" name="DistributionDeclaredPerCommonPartnershipUnit" type="us-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_DistributionDeclaredForCommonPartnershipUnitholders" name="DistributionDeclaredForCommonPartnershipUnitholders" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="bdn_DistributionsPaidPreferredUnitholders" name="DistributionsPaidPreferredUnitholders" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_CommonPartnershipUnitsIssued" name="CommonPartnershipUnitsIssued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_PartnershipUnitsIssuedForAcquisition" name="PartnershipUnitsIssuedForAcquisition" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
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  <element id="bdn_RedemptionPriceOfPartnershipUnit" name="RedemptionPriceOfPartnershipUnit" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_SharesAuthorizedForEquityOfferingProgram" name="SharesAuthorizedForEquityOfferingProgram" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_ReconciliationOfConsolidatedNetOperatingIncomeTextBlock" name="ReconciliationOfConsolidatedNetOperatingIncomeTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_DeferredIncomeGainsAndRent" name="DeferredIncomeGainsAndRent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="bdn_ScheduleOfIntangiblesAssetsAndLiabilitiesAcquiredTextBlock" name="ScheduleOfIntangiblesAssetsAndLiabilitiesAcquiredTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_EquityMethodInvestmentSummarizedFinancialInformationTextBlock" name="EquityMethodInvestmentSummarizedFinancialInformationTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_EquityMethodInvestmentSummarizedFinancialInformationIncomeStatementTextBlock" name="EquityMethodInvestmentSummarizedFinancialInformationIncomeStatementTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_NumberOfUnconsolidatedRealEstateVentures" name="NumberOfUnconsolidatedRealEstateVentures" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_NetRentableSpace" name="NetRentableSpace" type="us-types:areaItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_FutureAmortizationExpenseThereafter" name="FutureAmortizationExpenseThereafter" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_AdditionalInvestmentInUnconsolidatedVenturesTextualsAbstract" name="AdditionalInvestmentInUnconsolidatedVenturesTextualsAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_ScheduleOfRentalPropertiesTextBlock" name="ScheduleOfRentalPropertiesTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_SupplementalProFormaOperatingDataTextBlock" name="SupplementalProFormaOperatingDataTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_ScheduleOfFinancialInstrumentsWithFairValuesDifferentFromTheirCarryingAmountTextBlock" name="ScheduleOfFinancialInstrumentsWithFairValuesDifferentFromTheirCarryingAmountTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_OperatingLeasesFutureMinimumPaymentsDueTextBlock" name="OperatingLeasesFutureMinimumPaymentsDueTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_PrepaidRealEstateTaxesFromAcquisition" name="PrepaidRealEstateTaxesFromAcquisition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="bdn_LeasePercentageOfAcquiredProperty" name="LeasePercentageOfAcquiredProperty" type="us-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_DebtInstrumentMaturityDates" name="DebtInstrumentMaturityDates" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_LimitOnTaxCreditClaimsUnderCommunityRenewalTaxRelief" name="LimitOnTaxCreditClaimsUnderCommunityRenewalTaxRelief" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_BusinessAcquisitionPurchasePriceAllocationTextBlock" name="BusinessAcquisitionPurchasePriceAllocationTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_StraightLineGroundRentExpense" name="StraightLineGroundRentExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_ContributionsFromNewMarketTaxCreditTransactionNetOfDeferredCosts" name="ContributionsFromNewMarketTaxCreditTransactionNetOfDeferredCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_IncreaseDecreaseInDeferredIncomeGainsAndRents" name="IncreaseDecreaseInDeferredIncomeGainsAndRents" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_LoanProvidedToRealEstateVenturePartner" name="LoanProvidedToRealEstateVenturePartner" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="bdn_ReclassificationsAndOutOfPeriodAdjustmentPolicyTextBlock" name="ReclassificationsAndOutOfPeriodAdjustmentPolicyTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_RecentAccountingPronouncementPolicyTextBlock" name="RecentAccountingPronouncementPolicyTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_PercentageOfInterestAcquiredInPartnerships" name="PercentageOfInterestAcquiredInPartnerships" type="us-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_NumberOfOfficeBuildingsOwned" name="NumberOfOfficeBuildingsOwned" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_PercentageOfInterestAcquiredInPartnershipsByOtherPartner" name="PercentageOfInterestAcquiredInPartnershipsByOtherPartner" type="us-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_InitialContributionForAcquisitionOfPartnerships" name="InitialContributionForAcquisitionOfPartnerships" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="bdn_RemainingPortionOfContribution" name="RemainingPortionOfContribution" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="bdn_DerivativeTreasuryLockAgreements" name="DerivativeTreasuryLockAgreements" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_DerivativeExpirationPeriodOfTreasuryLockAgreements" name="DerivativeExpirationPeriodOfTreasuryLockAgreements" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_TenantsAccountedForTenPercentOrMoreOfCompanysRents" name="TenantsAccountedForTenPercentOrMoreOfCompanysRents" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_TreasuryRatesMinimum" name="TreasuryRatesMinimum" type="us-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_TreasuryRatesAverage" name="TreasuryRatesAverage" type="us-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_TreasuryRatesMaximum" name="TreasuryRatesMaximum" type="us-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_ExpenseOfDebtOffering" name="ExpenseOfDebtOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="bdn_OverstatementOfRevenueDueToUnderBilling" name="OverstatementOfRevenueDueToUnderBilling" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_NoOfSharesSoldByCompany" name="NoOfSharesSoldByCompany" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_RemainingSharesAvailableForSales" name="RemainingSharesAvailableForSales" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_BalancePortionOfAcquisitionRelatedLiability" name="BalancePortionOfAcquisitionRelatedLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="bdn_PriorPeriodReclassificationAdjustment" name="PriorPeriodReclassificationAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_UnderstatementOfRevenue" name="UnderstatementOfRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForOptionsAndStockAppreciationRights" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForOptionsAndStockAppreciationRights" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_RealizedGainsLossesOnSalesOfInvestmentRealEstate" name="RealizedGainsLossesOnSalesOfInvestmentRealEstate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_RemainingOwnershipInterestInRealEstateProperties" name="RemainingOwnershipInterestInRealEstateProperties" type="us-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_NumberOfRealEstateProperties" name="NumberOfRealEstateProperties" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_NumberOfPartnershipInWhichCompanyAcquiredInterest" name="NumberOfPartnershipInWhichCompanyAcquiredInterest" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_CommittedPreferredEquity" name="CommittedPreferredEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="bdn_FairValueTreasuryLockAgreements" name="FairValueTreasuryLockAgreements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="bdn_VoluntaryTerminationOfEmploymentTerms" name="VoluntaryTerminationOfEmploymentTerms" type="us-types:durationStringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_AccretionOfLiabilityRelatedToAcquisition" name="AccretionOfLiabilityRelatedToAcquisition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="bdn_ShareChoicePlanIssuanceValue" name="ShareChoicePlanIssuanceValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_ShareChoicePlanIssuanceShares" name="ShareChoicePlanIssuanceShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_NetLossIncomeFromContinuingOperationsAttributableToNonControllingInterestsDiluted" name="NetLossIncomeFromContinuingOperationsAttributableToNonControllingInterestsDiluted" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="bdn_SegmentInformationDetailsAbstract" name="SegmentInformationDetailsAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_SegmentsInformationAbstract" name="SegmentsInformationAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_BusinessAcquisitionConsiderationReceived" name="BusinessAcquisitionConsiderationReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfUnitsIssued" name="BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfUnitsIssued" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_BusinessAcquisitionCostOfAcquiredEntityCashPaidNetAmount" name="BusinessAcquisitionCostOfAcquiredEntityCashPaidNetAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="bdn_ParcelOfLandInPaMember" name="ParcelOfLandInPaMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_SaleConsiderationOfSoldProperty" name="SaleConsiderationOfSoldProperty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_NetRentableSpaceSold" name="NetRentableSpaceSold" type="us-types:areaItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_BusinessAcquisitionsEquityInterestIssuedOrIssuableDescription" name="BusinessAcquisitionsEquityInterestIssuedOrIssuableDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_ConsolidatedDebtObligationsTextBlock" name="ConsolidatedDebtObligationsTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_NoteEightMember" name="NoteEightMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_PropertyOccupiedAsOfDateOfSale" name="PropertyOccupiedAsOfDateOfSale" type="us-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_ShareBasedCompensationByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" name="ShareBasedCompensationByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" type="us-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_NumberOfStoreyOfOfficeTowerAcquired" name="NumberOfStoreyOfOfficeTowerAcquired" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_SeniorNotesDue2012Member" name="SeniorNotesDue2012Member" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_SeniorNotesDue2015Member" name="SeniorNotesDue2015Member" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_DeferredFinancingCostExpectedToBeWriteOff" name="DeferredFinancingCostExpectedToBeWriteOff" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="bdn_ThreeGreentreeCenterMember" name="ThreeGreentreeCenterMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_OverlookIAndIiMember" name="OverlookIAndIiMember" type="us-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_ExtensionFee" name="ExtensionFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="bdn_MinimumRemainingLeasePeriod" name="MinimumRemainingLeasePeriod" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_MaximumRemainingLeasePeriod" name="MaximumRemainingLeasePeriod" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_NetRentableSpacePercentageLeased" name="NetRentableSpacePercentageLeased" type="us-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_SupplementalProFormaOperatingDataAbstract" name="SupplementalProFormaOperatingDataAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_SummaryOfSignificantAccountingPoliciesDetailsAbstract" name="SummaryOfSignificantAccountingPoliciesDetailsAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_RealEstateInvestmentsNet" name="RealEstateInvestmentsNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="bdn_LongTermDebtMaturitiesRepaymentsOfPrincipal" name="LongTermDebtMaturitiesRepaymentsOfPrincipal" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="bdn_MaximumNumberOfShareToBeDeliveredUponMeasurementPeriodRelativeToShareholderReturn" name="MaximumNumberOfShareToBeDeliveredUponMeasurementPeriodRelativeToShareholderReturn" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_NumberOfSharesToBeIssuedUnderDeferredCompensationPlanIncludedInSharesOutstanding" name="NumberOfSharesToBeIssuedUnderDeferredCompensationPlanIncludedInSharesOutstanding" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="bdn_SummaryOfDebtRepurchasesTextBlock" name="SummaryOfDebtRepurchasesTextBlock" type="us-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="bdn_LeasePercentageOfSoldProperty" name="LeasePercentageOfSoldProperty" type="us-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
</schema>
