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

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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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AOC Elevator Mechanics at the Library of Congress
“We deal with a lot of history.” No, those aren’t the words of the AOC’s...