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Federal Triangle

Federal Triangle is the sweeping block of neoclassical government buildings running along Pennsylvania Avenue between the Capitol and the White House. Built in the late 1920s and 1930s as part of a unified federal precinct, it required clearing a dense neighborhood that had occupied the site since the Civil War. These posts explore the buildings and the community they replaced.

Federal Triangle History: The Story Behind A Name

April 26, 2026May 15, 2015 by ghostsofdc
Aerial view of Pennsylvania Avenue looking west, showing Federal Triangle and the National Mall. (2006)

The name “Federal Triangle” replaced “Pennsylvania Avenue Triangle” as federal buildings rose in the 1920s. The shape of the land gave it both names.

Categories Notable People & Places, Why Is It Named...? Tags 1920s, 1930s, Federal Triangle 4 Comments

An Aerial View of Federal Triangle and the Navy Memorial Under Construction

October 26, 2021December 1, 2013 by ghostsofdc

Get a bird’s eye view of Washington, D.C. with this aerial shot of Federal Triangle and the Navy Memorial under construction. Image taken during the 1980s.

Categories Faces & Places of Yesterday Tags 1980s, Federal Triangle, Pennsylvania Avenue

The Department of Commerce Under Construction, Seen from the National Press Building

April 27, 2026June 25, 2013 by ghostsofdc
Washington, D.C., circa 1931. "Department of Commerce under construction from top of National Press Building looking down 14th Street." Willard Hotel at right. Large format negative by Theodor Horydczak.

A Shorpy photograph taken from the top of the National Press Building looking down 14th Street, showing the Department of Commerce under construction with the Willard Hotel at right.

Categories Notable People & Places Tags 1930s, Architecture, Federal Triangle

Southern Railway Building: Fire, Then Federal Triangle

April 30, 2026March 25, 2013 by ghostsofdc
The Southern Railway Building at 13th Street and Pennsylvania Avenue NW, circa 1899-1916. The Library of Congress identifies the flags as probably for an inaugural event. This is the original Second Empire building, expanded in 1893 and 1899, that burned in April 1916. Library of Congress, National Photo Company Collection.

The Southern Railway Building stood at 13th and Pennsylvania for 50 years. Then it burned. Then the federal government paid $2.68 million to clear it for Federal Triangle.

Categories Lost History Tags 1910s, 1920s, 1930s, Architecture, Federal Triangle, Pennsylvania Avenue, Transit

The View from the Willard Hotel’s Roof in 1932: Federal Triangle Taking Shape

December 7, 2012 by ghostsofdc
Looking southwest at the Old Post Office Pavilion (far left), Southern Railway Building (middle), and District Building on Pennsylvania Avenue NW in Washington, D.C., in 1932. On in the fall of 1932, the structures in rear of the District Building would be razed to make way for the U.S. Department of Labor building, whose cornerstone would be laid on December 15, 1932

This 1932 photograph from the roof of the Willard Hotel shows Pennsylvania Avenue and the Federal Triangle construction underway. The Old Post Office Pavilion, the Southern Railway Building, and the District Building are all visible.

Categories Faces & Places of Yesterday Tags 1930s, Federal Triangle, Willard Hotel

Three Stories About the Department of Commerce Building

April 27, 2026November 19, 2012 by ghostsofdc
Department of Commerce, 15th St. side

A mile of hallways, 3,700 radiators weighing 420 tons, and a basement aquarium running since 1932. That’s the Commerce Department.

Categories The Best Of, Three Things... Tags 1930s, Architecture, Federal Triangle, Pennsylvania Avenue 5 Comments

Where Was Murder Bay in Washington, DC?

March 26, 2026March 29, 2012 by ghostsofdc
Murder Bay in 1855 (Smithsonian)

Murder Bay was the violent, vice-ridden neighborhood just east of the White House, now buried under the Federal Triangle. Here is what it looked like.

Categories Faces & Places of Yesterday, The Best Of Tags 1860s, 1870s, 1880s, Federal Triangle 20 Comments

Why Did They Rename B Street to Constitution Avenue?

April 27, 2026February 21, 2012 by ghostsofdc

Constitution Avenue was not always called Constitution Avenue. There’s a Wisconsin connection to the story that most DC residents don’t know.

Categories Why Is It Named...? Tags 1920s, 1930s, Congress, Federal Triangle, Landmarks, National Archives, Notable People, Politics, Thomas Jefferson 8 Comments
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