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

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Black and white picture of Frederick Law Olmsted  best known for designing the grounds of New York City’s Central Park, the U.S. Capitol in Washington, D.C., the Biltmore Estate in North Carolina, and the 1893 World’s Columbian Exposition in Chicago.
Regarded as the founder of American landscape architecture, Frederick Law...

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A virtual Map of Capitol Hill from above
View a map of the U.S. Capitol and other buildings and grounds cared for by the...

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East Front of the U.S. Capitol Building
AOC’s annual Performance and Accountability Report provides the results of the...

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Photo of US Capitol Building made of plant materials.
The U.S. Botanic Garden’s annual holiday exhibit is on display November 27...