Currently there are 121 National Register of Historic Places listings in Central Chicago, out of 350 listings in the City of Chicago. Central Chicago includes 3 of the 77 well-defined community areas of Chicago: the historic business and cultural center of Chicago known as the Loop, as well as the Near North Side and the Near South Side. The combined area is bounded by Lake Michigan on the east, the Chicago River on the west, North Avenue (1600 N.) on the north, and 26th Street (2600 S.) on the south. This area runs five and one-quarter miles from north to south and about one and one-half miles from east to west.
The Chicago central city area includes many early classic skyscrapers of the Chicago School of Architecture, such as Burnham and Root's Monadnock and the Reliance Buildings, as well as buildings from the early Modernist period, such as Ludwig Mies van der Rohe's IBM Building and 860-880 Lake Shore Drive Apartments. Chicago's earliest surviving building, the Henry B. Clarke House is on the Near South Side, close to the Prairie Avenue District, which many critics view as the jewel of residential Chicago architecture. Architect Louis Sullivan's work is represented by the Carson, Pirie, Scott and Company Building, and Auditorium Building. Though Frank Lloyd Wright worked downtown early in his career as an assistant to Sullivan - including work on the James Charnley House - his own work in the central city is represented only by a renovation of the lobby of Daniel Burnham's and John Wellborn Root's Rookery Building.
At least three sites relate to the city's role in nationwide retailing. Included also are several religious buildings, six hotels, and four theaters.