Kingdom Centre vs Hochhaus Neue Donau

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Kingdom Centre (Arabic: ???? ????????) is a 99-story, 302.3 m (992 ft) skyscraper in Riyadh, Saudi Arabia. When completed in 2002, it overtook the 267-meter Faisaliyah Tower as the tallest tower in Saudi Arabia. It has since been surpassed and has become the fifth-tallest skyscraper in the nation, whose tallest two buildings are the Abraj Al Bait Towers and the Capital Market Authority Tower. It is the world's third-tallest building with a hole following the Shanghai World Financial Center and the 85 Sky Tower in Taiwan. The mixed-use tower was created by Prince Al-Waleed bin Talal and designed by the group of Ellerbe Becket and Omrania, who were selected through an international design competition.

It is situated on a 100,000--square-metre website and houses the 57,000-square-meter Al-Mamlaka shopping mall, offices, the Four Seasons Hotel Riyadh, and luxury apartments. There is a 65m skybridge atop the skyscraper.The upper third of the tower features an inverted parabolic arch topped by a public sky bridge. The sky bridge is a 300-ton steel construction, taking the kind of an enclosed corridor with windows on either side. After paying the entrance fees, visitors take two elevators to reach that level.

Source: Wikipedia