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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Small Business Program
Information for Small Businesses interested in doing business with the...

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East Front of the U.S. Capitol
The AOC works to make the Capitol Dome, an enduring symbol of democracy...