Serving Congress and the Supreme Court, preserving America's Capitol, and inspiring memorable experiences

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National Statuary Hall
National Statuary Hall, also known as the Old Hall of the House, is the large...

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

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AOC gardener at the U.S. Botanic Garden
Information about working for the Architect of the Capitol:

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AOC employees plan renovations to Representative Tammy Duckworth's Office
A team of tradecrafts experts at the AOC transform an office into a completely...

Materials

  • Marble
    Marble is used throughout the U.S. Capitol Building, the congressional office...
     
  • Cast Iron
    Cast iron was used extensively in the U.S. Capitol’s mid-19th century House...
     
  • Sandstone
    Sandstone was a common building material during the early years of Washington...
     

The materials used in the construction of the Capitol were chosen with care to ensure the building would be a lasting landmark. Learn more about these building materials, why they were used, and where they came from.

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