wide (including approaches). The capitol occupies , has a perimeter of . The structure contains four stories, with public entrances on the ground floor. Two grand staircases in the north and south corridors go up to the top floor. The rotunda measures in diameter and in height measured from the floor to the oculus. When it opened, the Capitol structure was large enough to host all the state agencies and departments. Due to the growth of state government, however, only the offices of Senate and House leadership and ceremonial offices for the governor and lieutenant governor remain in the capitol. The ground floor corridors led to "store rooms" designed by the architect in the original building plans. This includes an armory in the southwest corner of the south corridor. The original wood floor has been replaced by gray tiles. The rooms were originally lit with gas fixtures, though by 1900, the building had been refitted with electric lights. Today, the ground floor is home to several offices, including the Secretary of the Senate, the Clerk of the House, and the Capitol Tours and Information Service. Starting with the first floor and continuing to the third, black and white floor tiling is made of Vermont marble and limestone. The exception is the floor of the rotunda which is composed of 976 blocks of translucent glass, supported by iron beams and columns. It is a vault light, admitting light to the floor below. The blocks vary in size so that when viewed from the upper floors, they appear to form a bowl which mirrors the dome above. The doorknobs are mostly made of a brass and bronze alloy (most of the original brass doorknobs have disappeared over time). The present doorknobs and hinges, locked for protection, display the state coat of arms. Though the building appears to have walnut woodwork, the wood is Michigan white pine that has been wood-grained to give the appearance of walnut. The first floor gives visitors their first view of the interior of the rotunda. Below the cast-iron dome, the ceiling displays eight muses painted in 1886. For more than a century, the muses' artist remained anonymous; it is now known that it was Tommaso Juglaris, who created them in his Boston studio and never came to Michigan. In the east wing of the first floor is a large clock, called a long-drop clock. It was once