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
Trump International Hotel and Tower (Chicago) Trump International Hotel and Tower (Chicago) The Trump International Hotel and Tower is a skyscraper condo-hotel in downtown Chicago, Illinois. The building, named after businessman and current U.S. President Donald Trump was designed by architect Adrian Smith of Skidmore, Owings and Merrill. Bovis Lend Lease built the 98-story structure, which reaches a height of including its spire, its roof topping out at . It is next to the main branch of the Chicago River, with a view of the entry to Lake Michigan beyond a series of bridges over the river. The building received publicity when the winner of the