Francis Preston Blair
Historical marker location:
1653 Pennsylvania Avenue Northwest, Downtown Washington, District of Columbia
( Marker is at the intersection of Pennsylvania Avenue Northwest and Jackson Place Northwest, on the right when traveling west on Pennsylvania Avenue Northwest.)
Marker installed: 1969
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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.