The capital of Colorado is Denver. Denver is the most populous city in the state and has been the official capital since a statewide referendum in 1881, although it served as the territorial capital since 1867
. The Colorado State Capitol building, located at 200 East Colfax Avenue in Denver, houses the Colorado General Assembly and the offices of the Governor, Lieutenant Governor, and State Treasurer. The building, constructed in the 1890s and opened in 1894, is notable for its neoclassical architecture and distinctive gold dome, which commemorates the Colorado Gold Rush
