Mecca Royal Clock Tower vs Sydney Tower

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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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Sydney Tower is Sydney's tallest structure and the second tallest observation tower in the Southern Hemisphere. The title Sydney Tower is becoming common in daily usageNonetheless, the tower has been known as the Sydney Tower Eye, AMP Tower, Flower Tower, Glower Tower, Westfield Centrepoint Tower, Big Poke, Centrepoint Tower or just Centrepoint. The Sydney Tower is a member of the World Federation of Great Towers.The tower stands 309 m (1,014 ft) over the Sydney central business district (CBD), located on Market Street, between Pitt and Castlereagh Streets. It's available from the Pitt Street Mall, Market Street or Castlereagh Street and sits over the Westfield Sydney (formerly Centrepoint) shopping center. The tower is open to the public, and is one of the most prominent tourist attractions in the city, being visible from a number of vantage points throughout town and from adjacent suburbs. Auckland's Sky Tower is taller but Sydney Tower's main observation deck is almost 30 m (98 ft) higher than the observation deck on Auckland's Sky Tower.While the shopping center at the base of the tower is run by Scentre Group, the tower itself is occupied by Trippas White Group, which owns and operates Sydney Tower Dining, and Merlin Entertainments, which owns and operates the'Sydney Tower Eye' observation deck and'Oztrek' simulated ride appeal.

Source: Wikipedia