Washington State's Legislative Building, completed in 1928 after six years of construction, serves as both a working governmental center and a symbol of Washington's free and democratic government. It is the centerpiece of the five historic buildings designed by New York architects Walter Wilder and Harry White. Conceived in the architectural competition of 1911 and selected by the State Capitol Commission, Wilder and White's designs for the Legislative Building were completed and set into motion in 1922.

 
The Legislative Building is comprised of more than 173 million pounds of stone, brick, concrete and steel. It is the fifth-tallest masonry dome in the world and the tallest in North America, rising 287 feet high.