ARTICLES OF AMENDMENT TO 
                            THE ARTICLES OF INCORPORATION
                             OF ROYALE INVESTMENTS, INC.

     The undersigned, President of Royale Investments, Inc., a Minnesota 
corporation (the "Company"), hereby certifies:

     1.   That effective January 1, 1998, Article I of the Company's Articles 
of Incorporation shall be amended to read in its entirety as follows:

          "RESOLVED, that Article I of the Articles of Incorporation of
     this corporation be, and the same hereby is, amended to read as
     follows:

                                      ARTICLE I

               The name of this corporation shall be CORPORATE OFFICE
          PROPERTIES TRUST, INC."

     2.   That a majority of the shareholders of the Company approved said 
amendment at a special meeting of the shareholders held on December 22, 1997, 
and such amendments have been adopted in accordance with the requirements of 
and pursuant to Chapter 302A of the Minnesota Statutes.

     I have subscribed my name this 23rd day of December, 1997.

                                   
                                   /s/ Clay W. Hamlin, III 
                                   ------------------------
                                   Clay W. Hamlin, III 
                                   President and CEO
STATE OF MINNESOTA  )
                    ) ss.
COUNTY OF DAKOTA    )

     Clay W. Hamlin, III, being first duly sworn, deposes and states that he 
is the President and Chief Executive Officer of Royale Investments, Inc., a 
Minnesota corporation; that he executed the foregoing Certificate of 
Amendment; that the contents thereof are true; that he takes this action 
pursuant to authority conferred upon him by the Board of Directors of said 
Corporation; that he makes this Articles of Amendment for and on behalf of 
said Corporation.

                                   /s/ Clay W. Hamlin, III 
                                   ------------------------
                                   Clay W. Hamlin, III

Subscribed and sworn to be before me
this 23rd day of December, 1997.

/s/ Albert Woodward 
- -------------------
Notary Public