The South Dakota State Capitol is the state capitol building of the U.S. state of South Dakota. Housing the South Dakota State Legislature, it is located in the state capital of Pierre at 500 East Capitol Avenue. The building houses the offices of most state officials, including the Governor of South Dakota.The building was constructed between 1905 and 1910. The plans for the building were designed by the Minneapolis architectural office of C.E. Bell and M.S. Detwiler, who gave the building similar features to the Montana State Capitol in Helena, Montana.
The floor in the capitol building is made of terrazzo tile. The floor is said to have been laid by 66 Italian artists. To give these artists a chance to place a mark in the building (without allowing them to actually sign their names to the floor), each is said to have been given a blue stone to place in the floor. Only 55 of these tiles have been found, however. It is thought that the remaining stones may have been placed in locations now covered by walls, doors, or carpeting.
From the first floor, a marble staircase leads upstairs. In front of the staircase, display cases house the First Lady Gown Collection. Miniature replicas have been made of the gown worn by each first lady to the state inaugural ball. These replicas are worn by dolls in the display case. Along with the doll, a picture of each governor's family and other mementos are also displayed.The third floor houses the state's House of Representatives and the state's Senate. The galleries for both, from which the public can observe the legislative process, are located on the fourth floor.