Exhibit 12.2

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

	For the years ended December 31,
	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)	$	(34,943	)	$	1,270		$	(9,109	)	$	(110	)	$	(42,168	)
Distributed income of equity investees		657			1,557			7,639			6,900			2,150
Amortization of capitalized interest		3,527			3,166			2,801			2,170			1,508
Fixed charges — per below		148,500			152,126			170,589			185,308			182,012
Less:
Capitalized interest		(10,385	)		(8,893	)		(16,746	)		(17,885	)		(9,537	)
Earnings before fixed charges	$	107,356		$	149,226		$	155,174		$	176,383		$	133,965
Fixed charges:
Interest expense from continuing operations (including amortization)	$	136,410		$	141,604		$	152,096		$	165,647		$	171,164
Ground leases and other		1,705			1,629			1,747			1,776			1,311
Capitalized interest		10,385			8,893			16,746			17,885			9,537
Total Fixed Charges	$	148,500		$	152,126		$	170,589		$	185,308		$	182,012
Ratio of earnings to combined fixed charges		(b	)		(b	)		(b	)		(b	)		(b	)

(a)

Amounts 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 $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, December 31, 2007, $8,925 for the year ended December 31, 2007 and $48,047 for the year ended December 31, 2006 to achieve a coverage ratio of 1:1.