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

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The Madison Building serves both as the Library's third major structure and as this nation's official memorial to President James Madison.
Opened in 1980, measuring 500 feet wide and 400 feet deep, the Madison...

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The Summerhouse on the Capitol Grounds surrounded by pink azalea flowers.
A few ideas to help you in planning a visit to Capitol Hill.

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Painted Portrait of Benjamin Henry Latrobe
Benjamin Henry Latrobe was hired by President Jefferson in 1803 to fill the...

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Photo of Citrus sinesis.
On February 28 at 2 p.m., explore the fascinating chemistry of oranges and...

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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