Exhibit 24

                                POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints
each of Lawrence J. Burian, and Mark C. Cresitello, and each of them
individually, the undersigned's true and lawful attorney-in-fact to:

(1)  execute for and on behalf of the undersigned, in the undersigned's capacity
     as an Officer and/or Director of, beneficial owner of and/or trustee of a
     trust which beneficially owns stock of MSG Spinco, Inc., to be renamed The
     Madison Square Garden Company (the "Company"), Forms 3, 4 and 5 and any
     other forms required to be filed in accordance with Section 16(a) of the
     Securities Exchange Act of 1934 (the "Exchange Act") and the rules
     thereunder ("Section 16 Form");

(2)  do and perform any and all acts for and on behalf of the undersigned which
     may be necessary or desirable to complete and execute any such Section 16
     Form, complete and execute any amendment or amendments thereto, and timely
     file such Section 16 Form with the United States Securities and Exchange
     Commission and any stock exchange or similar authority; and

(3)  take any other action of any type whatsoever in connection with the
     foregoing which, in the opinion of each such attorney-in-fact, may be of
     benefit to, in the best interest of, or legally required by, the
     undersigned, it being understood that the documents executed by each such
     attorney-in-fact on behalf of the undersigned pursuant to this Power of
     Attorney shall be in such form and shall contain such terms and conditions
     as he or she may approve in his or her discretion.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that each such attorney-in-fact, or his or
her substitute or substitutes, shall lawfully do or cause to be done by virtue
of this Power of Attorney and the rights and powers herein granted. The
undersigned acknowledges that each such attorney-in-fact is serving in such
capacity at the request of the undersigned, and is not assuming, nor is the
Company assuming, any of the undersigned's responsibilities to comply with
Section 16 of the Exchange Act.

The Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file any Section 16 Form with respect to
the undersigned's holdings of and transactions in securities issued by the
Company, unless earlier revoked by the undersigned in a signed writing delivered
to each such attorney-in-fact.

This power of attorney is not intended to, and does not, revoke, or in any way
affect, any prior power of attorney that I have executed.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 30th day of September, 2015.

                                        By: /s/ Wilt Hildenbrand
                                            ------------------------------------
                                            Wilt Hildenbrand