Aon Center Chicago
Aon Center is a skyscraper located in Chicago at 200 E.Randolph St. At its completion, the building, at 1,136 feet (346 m), was the tallest in Chicago. Gradually, however, taller skyscrapers were built and so Aon Center is currently the fourth tallest building. The Willis Tower, Trump International Hotel and Tower and St Regis Chicago have all risen to a greater height.
The building, which offers 83 above-ground floors and 5 underground floors, is used as offices and, of course, parking spaces and other amenities.
technical parameters Aon Center
| Location | 200 E. Randolph St. Chicago, Illinois 60601 United States |
| Architectural style | Modern |
| Type | Office |
| Cost | US$120 million |
| Construction started | 1970 |
| Opening | 1973 |
| Architectural height | 346.3 m (1,136 ft) |
| Tip height | 362.5 m (1,189 ft) |
| Top floor | 328 m (1,076 ft) |
| Floor area | 3,599,968 sq ft (334,448 m2) |
| Floor count |
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| Lifts / elevators | 50 /Otis Elevator Company/ |
| Main contractor | Turner Construction |
| Developer | Standard Oil of Indiana |
| Architect | Edward Durell Stone |
Aon Center
