![Aerial view showing the red-roof Federal Triangle government buildings, Washington, D.C. | Library of Congress Aerial view showing the red-roof Federal Triangle government buildings, Washington, D.C. | Library of Congress](http://tile.loc.gov/image-services/iiif/service:pnp:highsm:16300:16328/full/pct:50/0/default.jpg)
Aerial view showing the red-roof Federal Triangle government buildings, Washington, D.C. | Library of Congress
![Federal Triangle Historic District - The many buildings of Federal Triangle represent the tremendous growth of the federal government in during 20th century. | DC Historic Sites Federal Triangle Historic District - The many buildings of Federal Triangle represent the tremendous growth of the federal government in during 20th century. | DC Historic Sites](https://historicsites.dcpreservation.org/files/fullsize/49e9b60f03f70e495cdd172c64b6501e.jpg)
Federal Triangle Historic District - The many buildings of Federal Triangle represent the tremendous growth of the federal government in during 20th century. | DC Historic Sites
![Aerial view of Washington, D.C., offering a good view of the "triangle" in the Federal Triangle row of federal office buildings | Library of Congress Aerial view of Washington, D.C., offering a good view of the "triangle" in the Federal Triangle row of federal office buildings | Library of Congress](http://tile.loc.gov/image-services/iiif/service:pnp:highsm:14300:14353/full/pct:6.25/0/default.jpg)
Aerial view of Washington, D.C., offering a good view of the "triangle" in the Federal Triangle row of federal office buildings | Library of Congress
![Exterior view of the William Jefferson Clinton Federal Building in the Federal Triangle in Washington, D.C., located across 12th Street from the Old Post Office and houses the U.S. Environmental Protection Agency Exterior view of the William Jefferson Clinton Federal Building in the Federal Triangle in Washington, D.C., located across 12th Street from the Old Post Office and houses the U.S. Environmental Protection Agency](http://tile.loc.gov/image-services/iiif/service:pnp:highsm:42300:42368/full/pct:25/0/default.jpg)
Exterior view of the William Jefferson Clinton Federal Building in the Federal Triangle in Washington, D.C., located across 12th Street from the Old Post Office and houses the U.S. Environmental Protection Agency
![Federal Triangle: Triangle, Constitution Avenue, Pennsylvania Avenue, Federal Triangle (Washington Metro), Washington Metro, Ronald Reagan Building : Miller, Frederic P., Vandome, Agnes F., McBrewster, John: Amazon.it: Libri Federal Triangle: Triangle, Constitution Avenue, Pennsylvania Avenue, Federal Triangle (Washington Metro), Washington Metro, Ronald Reagan Building : Miller, Frederic P., Vandome, Agnes F., McBrewster, John: Amazon.it: Libri](https://m.media-amazon.com/images/I/71cQh81hK9L._AC_UF1000,1000_QL80_.jpg)
Federal Triangle: Triangle, Constitution Avenue, Pennsylvania Avenue, Federal Triangle (Washington Metro), Washington Metro, Ronald Reagan Building : Miller, Frederic P., Vandome, Agnes F., McBrewster, John: Amazon.it: Libri
![Federal Triangle Historic District - The many buildings of Federal Triangle represent the tremendous growth of the federal government in during 20th century. | DC Historic Sites Federal Triangle Historic District - The many buildings of Federal Triangle represent the tremendous growth of the federal government in during 20th century. | DC Historic Sites](https://historicsites.dcpreservation.org/files/fullsize/aa8a551dc47b79c9be6c21c4be2e727e.jpg)