- The project was originally supposed to extend east to Lake Michigan. The undeveloped portion was turned into a temporary golf course, and sold to other developers.
- This large mixed-use development is built over a former Illinois Central railroad yard, between the Chicago River and Grant Park.
- The buildings are interconnected by a 3-level street system and a labyrinthine shopping concourse.
- The upper street level is primarily for local access; the middle level for through traffic; and the lower level for deliveries and freight.
- The Illinois Center concourse can be accessed through several points, but the main entrance is through Michigan Plaza South.
- Several buildings on the fringe of Illinois Center appear to be part of the project but are not; e.g. Aon Center and Prudential Plaza.
- A. Epstein and Sons International, Inc.
- Fujikawa Conterato Lohan & Assoc.
- The Office of Mies van der Rohe
- Solomon Cordwell Buenz
- Harry Weese Associates
- Fujikawa Johnson & Associates
- Loewenberg + Associates
Also recorded for this building:
Acoustics consultant, Client, Concrete supplier, Consultancy, Developer, Elevator engineering, Elevator supplier, Escalator supplier, Facility management, Financing, Formwork supplier, General contractor, Interior designer, Light engineering, MEP engineering, Owner, Parking management, Property management, Roofing supplier, Shell construction, Structural engineering, Tenant
|1||Mandarin Oriental Tower Chicago||930 ft||65||skyscraper||2010||
|2||Michigan Plaza South||553 ft||46||skyscraper||1985||
|3||Park Millennium||544 ft||57||skyscraper||2002||
|4||Columbus Plaza||468 ft||47||skyscraper||1980||
|5||Swissôtel Chicago||457 ft||45||skyscraper||1989||
|6||Fairmont Hotel||426 ft||37||skyscraper||1987||
|7||Two Illinois Center||375 ft||32||skyscraper||1972||
|8||Hyatt Regency Chicago I||365 ft||33||skyscraper||1974||
|9||One Illinois Center||362 ft||30||skyscraper||1970||
|10||Three Illinois Center||350 ft||28||skyscraper||1979||
|11||Hyatt Regency Chicago II||347 ft||33||skyscraper||1980||
|12||Michigan Plaza North||335 ft||25||skyscraper||1981||
|13||Boulevard Towers East||80||skyscraper||