The first legislative session was held here in 1877. The growth of the state had increased the need for more file storage and office space than the Old State Capitol allowed. Today it is the center of Illinois government. The building is topped with a 405-foot dome and is a convention of Renaissance Revival and Second Empire Style. Visitors can watch Illinois politics in action from balcony-level seating when the legislature is in session. (Accessible entrances are on the East and West side of the Building).  For assistance please call Capitol Police at (217) 782-6008.