capitol

noun
  1. A building or complex of buildings where a state legislative body meets in the United States. noun
    The capitol building in Austin is a popular tourist attraction.
    The governor gave a speech at the state capitol.
  2. The building in Washington, D.C., where the United States Congress meets. noun
    The Capitol is located on Capitol Hill in Washington, D.C.
    Security was heightened around the Capitol during the presidential inauguration.