The mansion at 1801 Massachusetts Ave.
Historical marker location:
1800 Massachusetts Avenue Northwest, Dupont Circle, District of Columbia
( Marker is at the intersection of Massachusetts Avenue Northwest and 18th Street Northwest, on the right when traveling south on Massachusetts Avenue Northwest.)
Dupont Circle. Diverse Visions | One Neighborhood
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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.