Stewards of the iconic buildings and grounds of Capitol Hill since 1793.

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Outside view of the Longworth House Office Building with a clear blue sky in the background.
Completed in the spring of 1933, the Longworth House Office Building is the...

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A view of the Capitol Visitor Center lit up at night
The Office of Congressional Accessibility Services (OCAS) provides a variety...

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East Front of the U.S. Capitol Building
AOC’s annual Performance and Accountability Report provides the results of the...

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War of 1812
The War of 1812 Tour: Three Points of View Weekdays at 11 a.m. – Join 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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