Mecca Royal Clock Tower vs Big Ben

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The Abraj Al-Bait (Arabic: ????? ??????, romanized: ?Abr?? al-Bayt 'Towers of the House') is a government-owned complex of seven skyscraper hotels in Mecca, Saudi Arabia. These towers are a part of the King Abdulaziz Endowment Project which aims to update the city in catering to its pilgrims. The central hotel tower, the Makkah Royal Clock Tower, has the world's largest clock face and is the third-tallest building and fifth-tallest freestanding structure in the world. The clock tower comprises the Clock Tower Museum which occupies the top four floors of the tower.The building complex is metres away from the world's largest mosque and Islam's most sacred site, the Great Mosque of Mecca.

The developer and builder of this complex is that the Saudi Binladin Group, the Kingdom's largest construction firm. It's the world's second most expensive building with the whole cost of construction totalling US$15 billion. The complex was built after the demolition of the Ajyad Fortress, the 18th-century Ottoman citadel on top of a hill overlooking the Grand Mosque. The destruction of the historically important site in 2002 from the Saudi authorities sparked international outcry and a powerful response from Turkey.

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