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

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Longworth House Office Building
Completed in the spring of 1933, the Longworth House Office Building is the...

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Prohibited Items at the U.S. Capitol Building
In order to ensure the safety of visitors and staff and to preserve the...

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The AOC maintains the grounds of the U.S. Capitol
The roles and responsibilities of the Architect of the Capitol cover an...

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Earth Day Celebration at the U.S. Botanic Garden
Join the United States Botanic Garden for an Earth Day Celebration on the...

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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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