13 stones in the center represent the original colonies; the three rings symbolize areas of territory that enlarged the nation; surrounding the rings is a star burst with 32 points, one for each of the states in the Union when the floor was laid down; and surrounding the entire design is a gray band representing the U.S. Constitution. Cupola The statehouse is topped with a two-story cupola, measuring 70 ft. tall and 64 ft. wide, which acts as an observation deck for viewing the surrounding city. The space is the last original, unrenovated area of the statehouse. In the present day, tours are only available by special request. Visitors traditionally sign their names on the cupola's walls; the oldest reads "J. Cook 1870". Grounds The Ohio Statehouse grounds, known as Capitol Square, are a large square park space surrounding the statehouse, bordered by Broad, High, State, and 3rd streets. The grounds have been remodeled several times, and a parking garage was constructed under the front lawn in the 1960s. Presently the northwest and southwest corners of the grounds have penthouses to access the garage, while the northeast and southeast corners have automobile drives down into the garage. The east lawn, beside the Senate Building, was used for parking during the 20th century. The western portion of the statehouse grounds features a 3.5-ft-tall decorative metal fence. The fence was installed in 2012 as an additional security measure, though replicating the design of a prior fence in place from 1873 to 1964 (removed during construction of the underground parking garage). The eastern portion, the Veterans Plaza, remains open, and the fenced-off portion on the west side is never closed off except for special events. The Statehouse contains many large scale artworks on the grounds of the building. A large statuary group by Hermon MacNeil, the William McKinley Monument, honors and remembers Ohio governor and U.S. president William McKinley. The Great Seal of Ohio and the state motto, "With God, all things are possible", are engraved at the foot of the steps leading to the west entrance. Selected works Museum The Ohio Statehouse functions both as a working government building that contains the activities of a legislature and governor's office, and as a museum. During calendar years 2007 and 2008 approximately 70,000 visitors participated with organized tours of the building each of the years. The tours, exhibits and other public education activities are