POWER OF ATTORNEY

Know all by these presents that Marcin Urbaszek, does hereby make, constitute
and appoint each of Katharine A. Keenan, Scott Mathias 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 his ownership of or transactions in
securities of Blackstone Mortgage Trust, Inc., unless earlier revoked in
writing. The undersigned acknowledges that Katharine A. Keenan, Scott Mathias,
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, as amended.

By: /s/ Marcin Urbaszek

Name: Marcin Urbaszek
Date: January 3, 2025


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