Stewards of the iconic buildings and grounds of Capitol Hill since 1793.

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Front view of the Russell Senate Office Building at night.
The Russell Senate Office Building (built 1903-1908) is the oldest of the...

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A crowd of people visiting the Capitol during visitor hours
Please note: Many of these Capitol Hill buildings are working office buildings...

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Photo of Capitol Hill steps.
Download a PDF of the full list.

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Susan Dworkin photo.
Learn about climate change and staple foods at noon on October 24 at the U.S...

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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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