Historical Marker
Halcyon House
Historical marker location:
3400 Prospect Street Northwest, Georgetown, District of Columbia
( Marker is on Prospect Street Northwest west of 34th Street Northwest, on the right when traveling east.)
Marker installed: 1972
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.