exv12w2

Exhibit 12.2

Brandywine Operating Partnership, L.P.
Computation of Ratio of Earnings to Combined Fixed Charges
(in thousands)


	Three-months ended March 31,						For the years ended December 31,
	2011			2010			2010			2009			2008			2007			2006
Earnings before fixed charges:
Add:
Income (loss) from continuing operations before non-controlling interest and equity in earnings from unconsolidated real estate ventures (a)	$	(1,616	)	$	(8,309	)	$	(34,943	)	$	1,270		$	(9,109	)	$	(110	)	$	(42,168	)
Distributed income of equity investees		403			182			657			1,557			7,639			6,900			2,150
Amortization of capitalized interest		949			1,383			3,527			3,166			2,801			2,170			1,508
Fixed charges — per below		34,039			36,071			148,007			151,723			170,083			184,757			181,784
Less:
Capitalized interest		(380	)		(3,245	)		(10,385	)		(8,893	)		(16,746	)		(17,885	)		(9,537	)

Earnings before fixed charges	$	33,395		$	26,082		$	106,863		$	148,823		$	154,668		$	175,832		$	133,737

Fixed charges:
Interest expense from continuing operations (including amortization)	$	33,321		$	32,535		$	136,410		$	141,604		$	152,096		$	165,647		$	171,164
Ground leases and other		338			291			1,212			1,226			1,241			1,225			1,083
Capitalized interest		380			3,245			10,385			8,893			16,746			17,885			9,537

Total Fixed Charges	$	34,039		$	36,071		$	148,007		$	151,723		$	170,083		$	184,757		$	181,784

Ratio of earnings to combined fixed charges		(b	)		(b	)		(b	)		(b	)		(b	)		(b	)		(b	)


(a)		Amounts for the three-months ended March 31, 2011 and 2010 and for the years ended December 31, 2010, 2009, 2008, 2007 and 2006 have been reclassified to present properties sold. As a result, operations have been reclassified to discontinued operations from continuing opeartions for all periods presented.

(b)		Due to the registrant’s loss in the period, the coverage ratio was less than 1:1. The registrant must generate additional earnings of $644 and $9,989 for the three-months ended March 31, 2011 and 2010, respectively, to achieve a coverage ratio of 1:1. The registrant must also generate additional earnings of $41,144 for the year ended December 31, 2010, $2,900 for the year ended December 31, 2009, $15,415 for the year ended December 31, 2008, $8,925 for the year ended December 31, 2007 and $48,047 for the year ended December 31, 2006 to achieve the aforementioned coverage ratio.