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

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The U.S. Capitol Rotunda is a large, domed, circular room located 96 feet in diameter and 180 feet in height located in the center of the United States Capitol on the second floor.
The U.S. Capitol Rotunda is a large, domed, circular room 96 feet in diameter...

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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 AOC employee Richard Edmonds.
  The Architect of the Capitol magazine, Foundations & Perspectives,...

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AOC working cleaning the National Garden
The National Garden is a treasure for everyone.

History

Construction of the U.S. Capitol Building began in 1793 atop Jenkins’ Hill, now often referred to as “Capitol Hill.” Since then many additional buildings have been constructed around this site to serve Congress and the Supreme Court. The last major addition being the Capitol Visitor Center, completed in 2008.

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