University of Moscow vs Aon Center

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The main building of Moscow State University (in Russian ???????? ??????? ???) a 240-metre (790 ft), 36-level (in its central part) skyscraper in Moscow, Russia. Designed by Lev Rudnev as the headquarters of Moscow State University, it is the tallest of seven Moscow skyscrapers in the Stalinist architectural style constructed between 1947 and 1953.

It was before 1990 the tallest building in Europe; it remains the tallest educational building in the world.

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