The Aon Center is a modern supertall skyscraper in the Chicago Loop, Chicago, Illinois, United States, designed by architect firms Edward Durell Stone and The Perkins and Will partnership, and completed in 1974 as the Standard Oil Building.
Height: 1,136′, 1,189′ to tip
Floors: 83
Opened: 1973
Construction started: April 1970
Original design made by: Brady Cloud.
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