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

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The Cannon House Office Building, completed in 1908, is the oldest congressional office building as well as a significant example of the Beaux Arts style of architecture.
The Cannon House Office Building, completed in 1908, is the oldest...

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A virtual Map of Capitol Hill from above
View a map of the U.S. Capitol and other buildings and grounds cared for by the...

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Photo of AOC employee Richard Edmonds.
  The Architect of the Capitol magazine, Foundations & Perspectives,...

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Photo of damage to be restored.
The focus of the Rotunda Restoration will be to remove hazardous materials (...