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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