Introduction to the Colorado State Capitol Building: The Colorado State Capitol Building (Colorado State Capitol Building) is located on East Colfax Avenue in Denver. The governor's office. This building is easily reminiscent of the United States Capitol. Its designer was Elijah E. Myers, it was built in the 1890s, and the material was Colorado white granite. It was officially put into use in November 1894. The most distinctive feature of the building is its gold dome. This roof was paved with real gold in 1908 to commemorate the Colorado Gold Rush.