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

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Cannon House Office Building
The Cannon House Office Building, completed in 1908, is the oldest...

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Visitor Hours for the Buildings on Capitol Hill
Visitor Hours for the Buildings on Capitol Hill.

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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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Ralph Zollicoffer, Painter's Helper at the AOC
“You’ve got to shine,” says Tony Blue, a woodcrafter’s helper working for 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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