Q1 Tower vs Kingdom Centre

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Q1 Tower (an abbreviation of Queensland Number One) is a 322.5-metre (1,058 feet ) skyscraper in Surfers Paradise, Queensland, Australia. The residential tower on the Gold Coast has been the world's tallest residential building from 2005 to 2011. As of 2020 it is the ninth-tallest residential tower in the world and is the tallest building in Australia and the Southern Hemisphere, and the second-tallest freestanding construction in the Southern Hemisphere, behind the Sky Tower in Auckland, New Zealand.

The Q1 formally opened in November 2005. The landmark building was recognised as one of Queensland's icons during the state's 150th-birthday celebrations.

Source: Wikipedia

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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