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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Photo of the Capitol dome with an enclosure.
Update: January 2015 Scaffoldin​g and Restoring PhaseThe Dome Restoration...

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Beth Burrous, Biochemist and USBG Volunteers having a discussion inside a greenhouse
Learn about the science behind the headlines and food labels at the U.S Botanic...