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

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U.S. Capitol Dome
The U.S. Capitol’s dome made of cast iron was designed by Thomas U. Walter and...

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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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AOC Receives Historic Preservation Award
The Architect of the Capitol strives to perform all work at a high level of...

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The United States Capitol in 1846, with its original dome designed by Charles Bulfinch
Throughout the U.S. Capitol Building’s 220-year history, there have been many...