There are 41 stories in the Aon Center in Chicago.
Aon Center is a building found at Chicago in USA.
Aon Center - Los Angeles - was created in 1973.
The Aon Center in Chicago, IL (aka the Amoco Building and the Standard Oil Building) is 1136 feet high. (346 m)
Chicago's Willis Tower (formerly Sears Tower)
The Aon Center, formerly known as the Amoco Building and the Standard Oil Building, is located in Chicago, Illinois. It is the city's third largest skyscraper.
Aon Hewitt was created in 1940.
Aon plc was created in 1919.
Chicago Cultural Center was created in 1897.
Franklin Center - Chicago - was created in 1989.
Chicago Zen Center was created in 1974.
University of Chicago Medical Center was created in 1927.