Exhibit 24.1

                               POWER OF ATTORNEY

Know all by these presents that John Schreiber, does hereby make, constitute
and appoint Stephen D. Plavin, Randall S. Rothschild 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. 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). 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 his ownership of or transactions in
securities of Blackstone Mortgage Trust, Inc., unless earlier revoked in
writing. The undersigned acknowledges that Stephen D. Plavin, Randall S.
Rothschild 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/ John Schreiber
                                             ----------------------------------
                                             John Schreiber

                                       Date: September 30, 2013