Executive Office Building

Historical marker location:

700 Jackson Place Northwest, Downtown Washington, District of Columbia

( Marker is at the intersection of Pennsylvania Avenue Northwest and 17th Street Northwest, on the right when traveling east on Pennsylvania Avenue Northwest.)

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.