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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Stephen T. Ayers, FAIA, LEED AP, Architect of the Capitol
On February 24, 2010, President Barack Obama nominated Mr. Ayers to serve as...

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Masons work on Olmsted Terrace Steps
AOC is undertaking a project to repair, clean and preserve the Olmsted Terrace...

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