Attached files
Exhibit 32.1
LIBERTY PROPERTY TRUST
CERTIFICATIONS REQUIRED BY
RULE 13a-14(b) UNDER THE SECURITIES EXCHANGE ACT OF 1934
RULE 13a-14(b) UNDER THE SECURITIES EXCHANGE ACT OF 1934
In connection with the Quarterly Report of Liberty Property Trust (the Company) on Form 10-Q
for the quarterly period ended March 31, 2011 as filed with the Securities and Exchange Commission
on the date hereof (the Report), I, WILLIAM P. HANKOWSKY, President and Chief Executive Officer
of the Company, certify in connection with Rule 13a-14(b) under the Securities Exchange Act of
1934, as amended, that based on my knowledge:
(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the
Securities Exchange Act of 1934; and
(2) The information contained in the Report fairly presents, in all material respects, the
financial condition and result of operations of the Company.
/s/ WILLIAM P. HANKOWSKY |
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Chairman, President and Chief Executive Officer |
Date: May 5, 2011