Aon Center (Chicago)
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The Aon Center is a modern supertall skyscraper located in the Northeast corner of the Chicago Loop, Chicago, Illinois, United States. It was designed by a partnership between architecture firms Edwar
The Aon Center in 2016
View from Buckingham Fountain of the building while it was under-construction
Aon Center in the 1990s during its refacing, with temporary work elevators erected in the building's corners
From the east
Willis Tower
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The Willis Tower, formerly known and still commonly referred to as the Sears Tower, is a 110-story, 1,451-foot skyscraper in the Loop of Chicago, Illinois, United States. Designed by architect Bruce G
Aon Center (Chicago)
…nicknamed "Big Stan"). With 83 floors and a height of 1,136 feet (346 m), it is the fourth-tallest building in Chicago, surpassed in height by the Willis Tower, Trump International Hotel and Tower, and St. Regis Chicago. The building is managed by JLL, which is also headquartered in the building. Aon Center…
The Willis Tower as seen from the west in 2024
The Sears Tower (now the Willis Tower) during its construction in 1973
The tower in 1978, after its completion
The tower at night in 2009