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

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The Old Supreme Court Chamber is the first room constructed for the use of the nation's highest judiciary body and was used by the Court from 1810 until 1860. Built by Benjamin Henry Latrobe, it was a significant architectural achievement, for the size and structure of its vaulted, semicircular ceiling were virtually unprecedented in the United States.
The Old Supreme Court Chamber is the first room constructed for the use of the...

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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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Photo of Dome damage and scaffolding.
As scaffolding installation is completed on the Capitol Dome, the restoration...

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Bartholdi's Fountain
Take a walking tour of the U.S. Botanic Garden October 1 at 2 p.m., weather...

Projects

The AOC is responsible for the care and maintenance of more than 17 million square feet of buildings and 553 acres of grounds.

Many of these structures are more than a century old and their constant upkeep is critical as they are working office buildings of the Congress and the Supreme Court. While some projects are highly visible, such as the restoration of the Capitol Dome; many are unseen, such as modernization of plumbing and electrical systems or refurbishment of offices.

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