Kingdom Centre vs Big Ben

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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

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Big Ben is the nickname for the Great Bell of the striking clock in the north end of the Palace of Westminster in London; the name is often extended to refer to both the clock and the clock tower. The official name of this tower in which Big Ben is located was originally the Clock Tower; it was renamed Elizabeth Tower in 2012 to mark the Diamond Jubilee of Elizabeth II, Queen of the uk. The tower was designed by Augustus Pugin at a neo-Gothic style. When completed in 1859, its clock was the largest and most accurate four-faced striking and chiming clock on the planet. The tower stands 315 ft (96 m) tall, and the climb from ground level to the belfry is 334 steps. Its foundation is square, measuring 39 ft (12 m) on each side. Dials of the clock are 23 feet (7.0 m) in diameter. On 31 May 2009, celebrations were held to mark the tower's 150th anniversary.Big Ben is the biggest of the tower's five bells and weighs 13.5 long tons (13.7 tonnes; 15.1 short tons). It was the biggest bell in the United Kingdom for 23 years. The origin of this bell's nickname is open to question; it might be named after Sir Benjamin Hall, who oversaw its own installation, or heavyweight boxing champion Benjamin Caunt. Four quarter bells chime at 15, 30 and 45 minutes past the hour and just before Big Ben tolls on the hour. The clock uses its first Victorian mechanics, but an electric motor can be applied as a backup. The tower is a British cultural icon recognised all over the world. It is among the most prominent symbols of the uk and parliamentary democracy, and it is often used in the establishing shot of films set in London. The clock tower has been a part of a Grade I listed building since 1970 and a UNESCO World Heritage Site since 1987. On 21 August 2017, a four-year schedule of renovation works began on the tower, which are to include the addition of a lift. In addition, there are plans to re-glaze and repaint the clock dials. With a few exceptions, such as New Year's Eve and Remembrance Sunday, the bells should be silent until the work is completed in 2021.

Source: Wikipedia