... 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 ...