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

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National Statuary Hall
National Statuary Hall, also known as the Old Hall of the House, is the large...

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Getting Here
Located at the center of Washington, D.C., the U.S. Capitol Building and other...

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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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U.S. Capitol Dome
Architect of the Capitol Stephen T. Ayers, FAIA, LEED AP, reflects on the AOC...

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A Century of Service

This year, the Capitol Power Plant marks 100 years of steady service of steam and chilled water to heat and cool the Capitol. In that century of service, the plant has undergone significant changes as new buildings were built, and more modern and efficient equipment was installed.

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