State House, at 107 N. Main St., is said to be the country's oldest statehouse in which the legislature continues to meet in the original chambers. Constructed of Concord granite and Vermont marble, the 1819 neoclassic structure is the focal point of State House Plaza. Featured are portraits of the state's well-known residents, the Hall of Flags, four mural panels by Barry Faulkner and a visitor center with dioramas and displays. Statues and historical markers adorn the plaza. The Memorial Arch, built in 1891, honors New Hampshire's soldiers and sailors.