Decatur House
Historical marker location:
1610 H Street Northwest, Downtown Washington, District of Columbia
( Marker is at the intersection of H Street Northwest and Jackson Place Northwest, on the right when traveling east on H Street Northwest.)
Marker installed: 1961
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The city was built on a swamp: The area that is now Washington, D.C. was originally a swampy, marshy region along the Potomac River. The construction of the city involved extensive drainage and landfill projects to make the land suitable for building.