Andrew W. Mellon

Historical marker location:

401 Constitution Avenue Northwest, Federal Triangle, District of Columbia

( Marker is on Pennsylvania Avenue Northwest east of 6th Street Northwest (U.S. 50).)

Marker installed: 1951

1855 1937. [Memorial Fountain]

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.