TV Tower vs Aon Center

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Radio masts and towers are, typically structures designed to support antennas for telecommunications and broadcasting. There are two kinds: structures that are guyed and self-supporting. They are among the tallest human-made structures.

Masts are often named after the broadcasting organizations that currently use them or initially built them. In the event of a mast radiator or radiating tower, tower or the whole mast is the transmitting antenna.

Source: Wikipedia

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The Aon Center (200 East Randolph Street, formerly Amoco Building) is a modern supertall skyscraper just east of the Chicago Loop, Chicago, Illinois, United States, designed by architect Companies 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 ft (346 m), it's the fourth-tallest construction 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.

Source: Wikipedia