Serving Congress and the Supreme Court, preserving America's Capitol, and inspiring memorable experiences

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About the Grounds
The United States Capitol Building is located in a 58-acre park that was...

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Guided Tours: Buildings on Capitol Hill
Official Tours of the U.S. Capitol Building are offered Monday through...

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Benjamin Henry Latrobe
Benjamin Henry Latrobe was hired by President Jefferson in 1803 to fill the...

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Union Troops at the Capitol - 1861
Weekdays at 3 p.m. — In honor of the 150th Anniversary of the Civil War, a...

House Office Buildings

The first congressional office buildings were constructed immediately after the turn of the century to relieve overcrowding in the Capitol. Previously, members who wanted office space had to rent quarters or borrow space in committee rooms. The Cannon House Office Building, completed in 1908, is the oldest congressional office building, with the Longworth, Rayburn and Ford House Office Buildings being added later to house the growing Congress.

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