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

Featured

The Frieze of American History in the Rotunda of the United States Capitol
The Frieze of American History in the Rotunda of the United States Capitol...

Featured

A view of the Capitol Visitor Center lit up at night
The Office of Congressional Accessibility Services (OCAS) provides a variety...

Featured

East Front of the U.S. Capitol Building
AOC’s annual Performance and Accountability Report provides the results of the...

Featured

AOC Capitol jurisdiction decorative painters create a faux marble fireplace.
Find out how the AOC's painters use tricks of the trade to turn wood into...

Materials

  • A row of marble statues in National Statuary Hall in the U.S. Capitol.
    Marble is used throughout the U.S. Capitol Building, the congressional office...
     
  • Nighttime view of the cast iron used in the making of the Capitol's dome.
    Cast iron was used extensively in the U.S. Capitol’s mid-19th century House...
     
  • Sandstone walls and paintings of the U.S. Capitol Rotunda
    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.

Is a Video: 
0