Aon Center (Chicago) Aon Center (Chicago) The Aon Center (200 East Randolph Street, formerly Amoco Building) 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. With 83 floors and a height of 1,136 feet (346 m), it is the third tallest building in Chicago, surpassed in height by the Willis Tower, and the Trump International Hotel and Tower. The building is managed by Jones Lang LaSalle, which is also headquartered in the building. Aon Center formerly had
Southwest Tower Building of Texas phone center to Sears Vinyl Siding. When it opened in 1972 it was considered the leading business tower in the city. (Austin American-Statesman November 18, 1972) The Southwest Tower Building was the site of a fire on Sunday, March 6, 2011. No cause has been given for the fire. Southwest Tower Building The Southwest Tower Building is a 12-storey, building at 211 East 7th St. in Downtown Austin, Texas and is located across the street from the historic Driskill Hotel and the modern Omni Hotel. On the edge of the E. 6th Street entertainment district and Congress Avenue,