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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Washington D.C. is a city of spooks, almost all of whom are powerful and wealthy.