Due to a special event taking place in the U.S. Capitol on Thursday, September 18, there will be no tours of the U.S. Capitol that day until approximately noon. The Capitol Visitor Center will remain open during this time, and guided tours in the Capitol Visitor Center will be available.

A Capitol Growth Spurt

Across America, the 1930s was the era of the Great Depression. On Capitol Hill, it was a decade of rapid expansion. While the Capitol itself remained largely unchanged, the surrounding campus was transformed. Six major building projects greatly expanded Capitol Hill’s facilities.

The construction reflected the growing role and size of the federal government. Projects included: the Supreme Court Building (1929-1935); Longworth House Office Building (1929-1933); Rare Book Room Addition for the Library of Congress’s Thomas Jefferson Building (1929-1933); First Street Addition to the Russell Senate Office Building (1931-1933); New Botanic Garden Conservatory (1932-1933); and the John Adams Building for the Library of Congress (1933-1938).

  • Construction of the Rare Book Room addition, Library of Congress, Thomas Jefferson Building, ca. 1931.Construction of the Rare Book Room addition, Library of Congress, Thomas Jefferson Building, ca. 1931.

    Construction of the Rare Book Room addition, Library of Congress, Thomas Jefferson Building, ca. 1931.

    Architect of the Capitol

  • Library of Congress, John Adams Building, Pierson & Wilson, architects, ca. 1938

    Library of Congress, John Adams Building, Pierson & Wilson, architects, ca. 1938

    Architect of the Capitol

  • U.S. Botanic Garden Conservatory, Bennett, Parsons & Frost, architects, 1982

    U.S. Botanic Garden Conservatory, Bennett, Parsons & Frost, architects, 1982

    Architect of the Capitol

  • The Bartholdi Fountain

    In 1932, the fountain was moved from the Mall to its current location south of the U.S. Botanic Garden Conservatory.

    rchitect of the Capitol

  • Longworth House Office Building, by the Allied Architects, ca. 1933

    Longworth House Office Building, by the Allied Architects, ca. 1933

    D.C. Public Library, Star Collection, Copyright Washington Post

  • First Street Addition to the Russell Senate Office Building, by architects Nathan Wyeth and Francis P. Sullivan, ca. 1930

    First Street Addition to the Russell Senate Office Building, by architects Nathan Wyeth and Francis P. Sullivan, ca. 1930

    Architect of the Capitol