The Aon Center is a modern supertall skyscraper just east of 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. With 83 floors and a height of 1,136 feet, it is the fourth-tallest building in Chicago, surpassed in height by Willis Tower, Trump International Hotel and Tower, and Vista Tower.
The building is managed by Jones Lang LaSalle, which is also headquartered in the building. Aon Center formerly housed the world headquarters of Aon and Amoco. Aon still maintains headquarters of its US operations there. The building is also the co-headquarters of Kraft Heinz.
The Lower South Lobby is open 24 hours a day, 7 days a week.
Official website http://www.aoncenter.info/toc.cfm
Address 200 E Randolph St, Chicago, IL 60601, USA
Coordinates 41°53'7.029" N -87°37'17.452" E