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AON Center (Amoco Building)
Address:
200 E. Randolph St.
Chicago, IL
Category: Building
The AON Center (previously known as the Amoco Building) was designed by Perkins & Will and Edward Stone. It was completed in 1974 to become the second tallest building in Chicago. It is 1,136 feet high with 80 stories and 2.3 million square feet of floor space. It offers spectacular views of Chicago and Lake Michigan from all floors.
The tallest building in U.S.A. to ever change its name. Aon Center was known for a long time as the Amoco Building and before that as the Standard Oil Building (or affectionately as "Big Stan").
This is the tallest building in the world without any major antennae, spires, or finials at the top.
