U.S. Constitution, Article I — The Legislative Branch, Section 8, Clause 17
To exercise exclusive Legislation in all Cases whatsoever, over such District (not exceeding ten Miles square) as may, by Cession of particular States, and the Acceptance of Congress, become the Seat of the Government of the United States, and to exercise like Authority over all Places purchased by the Consent of the Legislature of the State in which the Same shall be, for the Erection of Forts, Magazines, Arsenals, dock-Yards, and other needful Buildings;—And
Notes
Allows Congress to exercise exclusive legislation over a district of up to ten miles square that becomes the seat of government through cession by particular states, and similar authority over places purchased with a state legislature's consent for forts, magazines, arsenals, dockyards and other needed buildings.
Use as reference
Lexinter.net | U.S. Const. art. I, § 8, cl. 17 | https://laws.lexinter.net/constitution/us/article-1/section-8/clause-17