Fairmont Hotels & Resorts has announced that the Makkah Clock Royal Tower will be officially opening in Q3 2010. The 858-room hotel, which is part of seven-tower Abraj Al Bait Complex, will offer several dining outlets and conference facilities. At 577 metres high, the 76-storey hotel tower will be among the world's tallest and features a 40-metre clock, more than five times bigger than Big Ben in London, which will announce daily prayers to the Muslim world, in addition to a Lunar Observation Centre and an Islamic Museum.