Aon Center (Chicago) the world headquarters of Aon and Amoco. Aon's US operations are still headquartered here. The building is also the co-headquarters of Kraft Heinz. The Standard Oil Building was constructed as the new headquarters of the Standard Oil Company of Indiana, which had previously been housed at South Michigan Avenue and East 9th Street. When it was completed in 1973, it was the tallest building in Chicago and the fourth-tallest in the world, earning it the nickname "Big Stan". (A year later, the Sears Tower took the title as Chicago's and world's tallest.) The building employs a tubular steel-framed structural system
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,