Prime Tower vs Aon Center

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The Prime Tower, also called'Maag-Tower' in a previous stage of preparation, is a skyscraper in Zurich, Switzerland. At a height of 126 metres (413 feet ), it was the highest skyscraper in Switzerland from 2011 until 2015, when the Roche Tower at Basel (standing at 178 metres (584 feet )) was finished. The building is situated near the Hardbrücke railway station. The tower replaces an industrial facility that's been demolished. According to its developers, the tower's construction, which took 15 years to plan and execute, was a financial success, with its valuation based on rental rates exceeding the building cost by CHF 110 million.

The tower and its two companion buildings, Cubus and Diagonal, are used primarily as office buildings. Due to its opening in December 2011, the tower hosts the'Clouds' restaurant on its top floor, a conference center, the Hotel Rivington & Sons on the ground floor, in addition to the offices of Deutsche Bank Schweiz, Homburger AG, Transammonia, Korn/Ferry International, Citibank Switzerland, Infosys, Repower AG, Ernst & Young, Zürcher Kantonalbank and consulting firms.

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