A 15-minute peek into the Athenaeum will show you one of America's finest collections of Victorian-period architectural design and also give you the flavor of private 19th-century life for the proper Philadelphian. The building, beautifully restored in 1975, houses almost one million library items for the serious researcher of American architecture. Visitors are welcome to view the changing exhibitions of rare books, drawings, and photographs in the recently reconstructed first-floor gallery; tours of the entire building or collections require an appointment.