Gregory J. Thor

                         LIMITED POWER OF ATTORNEY FOR
                        SECTION 16 REPORTING OBLIGATIONS

Know  all  by these presents, that the undersigned hereby makes, constitutes and
appoints  each of DAVID L. FINCH and LEE W. MURRAY, each acting individually, as
the  undersigned's  true  and  lawful  attorney-in-fact,  with  full  power  and
authority as hereinafter described on behalf of and in the name, place and stead
of the undersigned to:

(1)   prepare,  execute,  acknowledge,  deliver  and  file  Forms  3,  4,  and 5
      (including  any  amendments  thereto)  with  respect  to the securities of
      CORPORATE  OFFICE  PROPERTIES  TRUST,  a  Maryland  real estate investment
      trust,  and/or  CORPORATE  OFFICE  PROPERTIES,  L.P.,  a  Delaware limited
      partnership  (the  "Company"), required to be filed with the United States
      Securities  and Exchange Commission, any national securities exchanges and
      the  Company  pursuant  to Section 16(a) of the Securities Exchange Act of
      1934 and the rules and regulations promulgated thereunder, as amended from
      time to time (the "Exchange Act");

(2)   seek   or   obtain,   as  the  undersigned's  representative  and  on  the
      undersigned's   behalf,  information  on  transactions  in  the  Company's
      securities  from  any  third party, including brokers and employee benefit
      plan  administrators  and  trustees, and the undersigned hereby authorizes
      and approves any such release of information; and

(3)   perform   any  and  all  other  acts  which  in  the  discretion  of  such
      attorney-in-fact  are  necessary  or  desirable  for  and on behalf of the
      undersigned in connection with the foregoing.

The undersigned acknowledges that:

(1)   this  Power  of  Attorney  authorizes,  but  does  not  require, each such
      attorney-in-fact  to  act  in  their discretion on information provided to
      such   attorney-in-fact   without   independent   verification   of   such
      information;

(2)   any  documents prepared and/or executed by either such attorney-in-fact on
      behalf  of  the  undersigned pursuant to this Power of Attorney will be in
      such  form  and  will  contain  such  information  and  disclosure as such
      attorney-in-fact, in his or her discretion, deems necessary or desirable;

(3)   neither  the  Company nor either of such attorneys-in-fact assumes (i) any
      liability   for  the  undersigned's  responsibility  to  comply  with  the
      requirement of the Exchange Act, (ii) any liability of the undersigned for
      any  failure  to comply with such requirements, or (iii) any obligation or
      liability  of  the undersigned for profit disgorgement under Section 16(b)
      of the Exchange Act; and

(4)   this   Power   of   Attorney   does   not  relieve  the  undersigned  from
      responsibility for compliance with the undersigned's obligations under the
      Exchange  Act,  including  without  limitation  the reporting requirements
      under Section 16 of the Exchange Act.

The  undersigned hereby gives and grants each of the foregoing attorneys-in-fact
full  power  and  authority  to  do  and  perform  all  and  every act and thing
whatsoever  requisite,  necessary  or  appropriate  to  be done in and about the
foregoing  matters as fully to all intents and purposes as the undersigned might
or could do if present, hereby ratifying all that each such attorney-in-fact of,
for  and  on behalf of the undersigned, shall lawfully do or cause to be done by
virtue of this Limited Power of Attorney.

This  Power  of  Attorney shall remain in full force and effect until revoked by
the undersigned in a signed writing delivered to each such attorney-in-fact.

IN  WITNESS  WHEREOF,  the  undersigned  has caused this Power of Attorney to be
executed as of this 25th day of August 2016.

/s/ Gregory J. Thor
----------------------------------
Gregory J. Thor

STATE OF MARYLAND.....)
......................................)
COUNTY OF  HOWARD                        )
On  this  25th  day  of  August,  2016, Gregory J. Thor, personally appeared
before  me,  and  acknowledged that he executed the foregoing instrument for the
purposes  therein contained. IN WITNESS WHEREOF, I have hereunto set my hand and
official seal.

Monique Y. Jones
Notary Public

My Commission Expires:  11/21/16