Actually..........we were both right............they moved it.........

U.S. Capitol Gatehouses and Gateposts

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U.S. Capitol Gatehouses And Gateposts
U.S. National Register of Historic Places
Gatehouse
Location	7th, 15th, and 17th Streets, and Constitution Avenue, NW, Washington, D.C.
Coordinates	38°53′32.53″N 77°2′02.06″WCoordinates: 38°53′32.53″N 77°2′02.06″W
Architect	Charles Bulfinch
Architectural style	Early Republic
Governing body	National Park Service
NRHP Reference #	73002120
Added to NRHP	November 30, 1973[1]

The U.S. Capitol Gatehouses and Gateposts — designed circa 1827 by celebrated architect Charles Bulfinch — originally stood on the grounds of the United States Capitol in Washington, D.C. Two of the gatehouses are listed on the National Register of Historic Places in their new locations.
One gatehouse and three of the gateposts now stand at 15th Street and Constitution Avenue within the President's Park South historic district. The other gatehouse is at 17th and Constitution, also within the PPS. Four other gateposts have been relocated to the main entrance of the National Arboretum at New York Avenue NE and Springhouse Road NE.