Tokyo Sky Tree vs Aon Center

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Tokyo Skytree (????????, T?ky? Sukaitsur?, stylized TOKYO SKYTREE) is a broadcasting and monitoring tower in Sumida, Tokyo. It became the tallest construction in Japan in 2010 and reached its full height of 634.0 meters (2,080 ft) in March 2011, making it the tallest tower in the world, displacing the Canton Tower, and the second tallest structure on earth following the Burj Khalifa (829.8 m/2,722 ft).The tower is your primary television and radio broadcast website for the Kant? region; the elderly Tokyo Tower no longer provides complete digital terrestrial television broadcasting protection because it is surrounded by high-rise buildings.

Skytree was completed on Leap Day, 29 February 2012, with the tower opening to the public on 22 May 2012. The tower is the centrepiece of a large business development financed by Tobu Railway (which owns the complex) and a group of six terrestrial broadcasters led by NHK. Trains stop at the adjacent Tokyo Skytree Station and nearby Oshiage Station. The complex is 7 km (4.3 mi) north-east of Tokyo Station.

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