S.C. Code Ann. § 3-3-150

A lot of land for a courthouse and office connected therewith for the use of the United States courts or for any other purposes to which the government of the United States may think proper to apply it has been ceded to the United States described as follows, viz.: All that lot, piece or parcel of land, with the buildings thereon, known as the "Charleston Club House," situate, lying and being on the west side of Meeting Street, in the city of Charleston, measuring and continuing in front, on Meeting Street, fifty-eight feet, more or less, by about two hundred and thirty-six feet in depth, more or less; bounding, north, on lands formerly of Wm. P. Greeland; to the east, on Meeting Street; to the south, on lands formerly of M. C. Mordecai; and to the west, on lands of the French Protestant Church. But all process, civil or criminal, issued under the authority of this State or any officer thereof may be served and executed on any part of said premises and on any person there being and implicated in any matter of law. Said lot of land and all the buildings and structures of every kind erected thereon shall be absolutely and forever exempt from all taxes of the county of Charleston, the corporation of the city of Charleston and this State.