Noun

1. Temple of Jupiter in Rome.
2. The building in Washington, D.C., where the Congress of the United States meets.
3. A building or complex of buildings in which any legislature meets.

   The capitol building is located smack-dab in the middle of the state capital.

   • 1901 January 1, "Twentieth Century's Triumphant Entry", The New York Times, page 1,

     The centre of attraction was the City Hall. Two thousand flags and more ...; 2,000 electric lights... combined to make the civic capitol gorgeous... .