Exhibit 24.1

                               POWER OF ATTORNEY

Know all by these present that Katharine Keenan, does hereby make,
constitute and appoint each of Stephen D. Plavin, Leon Volchyok and
Anthony F. Marone, Jr., or any one of them, as a true and lawful
attorney-in-fact of the undersigned with full powers of substitution
and revocation, for and in the name, place and stead of the undersigned
(in the undersigned's individual capacity), to execute and deliver such
forms that the undersigned may be required to file with the U.S. Securities
and Exchange Commission as a result of the undersigned's ownership of or
transactions in securities of Blackstone Mortgage Trust, Inc. (i) pursuant
to Section 16(a) of the Securities Exchange Act of 1934, as amended,
including without limitation, statements on Form 3, Form 4 and Form 5
(including any amendments thereto) and (ii) in connection with any
applications for EDGAR access codes, including without limitation the
Form ID. The Power of Attorney shall remain in full force and effect until
the undersigned is no longer required to file Forms 3, 4, and 5 with regard
to her ownership of or transactions in securities of Blackstone Mortgage
Trust, Inc., unless earlier revoked in writing. The undersigned acknowledges
that Stephen D. Plavin, Leon Volchyok and Anthony F. Marone, Jr. are not
assuming any of the undersigned's responsibilities to comply with Section 16
of the Securities Exchange Act of 1934.




                                       By:   /s/ Katharine A. Keenan
                                             ----------------------------------
                                             Katharine A. Keenan

                                       Date: February 14, 2020