supervising the expenditures, acquiring property, setting building specifications, selecting the architect and general contractor, and giving final approval for the type of stone to use on the exterior, as well as the art and artists. The site selected by the commission was "Wabasha Hill", bounded by Park Avenue, University Avenue, Cedar and Wabasha Streets, and Central Avenue. While this was the costliest of the four sites considered for the Capitol, it was the largest, and the Commission concluded that it was the best location for the building. Dozens of companies and hundreds of workers worked to complete the statehouse. Six workers were killed in accidents between 1898 and 1903 as a result of unsafe working conditions. Upon completion, the building drew praise from the architecture community, leading to requests for Gilbert to design Capitol buildings for other states, such as West Virginia and Arkansas, and other notable structures. Originally, the Capitol housed all the executive offices and the three branches of state government, state agencies and commissions, and the Minnesota Historical Society. Expansion of offices and meeting rooms, reconstruction of chambers, and subdivision of corridors occurred as early as the 1930s. As needs expanded, the state agencies and commissions, and over half of the executive offices, moved out of the Capitol to other buildings. One of the first to leave was the Minnesota Historical Society, which relocated to its own building (now the Minnesota Judicial Center) next to the Capitol in 1915. Most recently, the offices of the Senate moved to the newly constructed Minnesota Senate Building in January 2016. The structure was added to the National Register of Historic Places in 1972. Architecture The Minnesota Capitol is usually described as "Beaux-Arts", a modern term not in use when the Capitol was built, but a style made popular in part by the architecture at the Chicago World’s Columbian Exposition in 1893. In addition to being influenced by his time at the World's Columbian Exposition, the State Capitol's architect Cass Gilbert was inspired by McKim, Mead & White's Rhode Island State House. Gilbert wrote a note in the margins on a 1912 article on his work stating that his plan of the Minnesota capitol had been greatly influenced by the one in Rhode Island. The building's structure consists of a steel and cast iron frame on rough limestone foundation walls resting on concrete footings. Guastavino tile vaulting forms the ceilings on