Andrew Mellon Building
Historical marker location:
1785 Massachusetts Avenue Northwest, Dupont Circle, District of Columbia
( Marker is at the intersection of 18th Street Northwest and Massachusetts Avenue Northwest, on the right when traveling north on 18th Street Northwest.)
Marker installed: 1977
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The District was originally much larger: The District of Columbia originally included land from both Maryland and Virginia, but in 1846, the portion of the District that had been taken from Virginia was returned to the state.