
The world's tallest tower is Dubai's masterpiece, Burj Khalifa.
The construction of the magnificent building began on 21 September 2004.
The building officially opened on 4 January 2010. While Adrian Smith was the chief architect, Bill Baker was the chief structural engineer.
It holds the world record in several aspects.
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Burj Khalifa has been designed to include include 30,000 homes and nine hotels.
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It has the world's highest restaurant at the 122nd floor at 442 metres (1,450 feet).
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It has the world's highest installation of an aluminium and glass facade at a height of 512 metres (1,680 feet).
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It has the world's fastest elevators running at a speed of 64 km/hr (40 mph).
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It has the world's highest outdoor observation deck at the 124th floor at a height of 452 metres (1,483 feet).
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It has the world's highest nightclub at the 144th floor.
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It is a building with the maximum number of floors at 160.
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It has the world's second highest swimming pool at the 76th floor.
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Burj Khalifa is expected to hold up to 35,000 people at any one time.
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The project's completion coincided with the global financial crisis of 2007?which led to high vacancies and foreclosures.

The tower was renamed Burj Khalifa, to honour the UAE President Khalifa bin Zayed Al Nahyan for his crucial support during the financial crisis.
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Burj Khalifa has been designed to be the centrepiece of a large-scale development that would include 30,000 homes, nine hotels, 7.4 acres of parkland, at least 19 residential towers, the Dubai Mall, and the 30-acre man-made Burj Khalifa Lake.

Burj Khalifa was designed based on the 73-storied Tower Palace Three, an all residential building in Seoul.
Burj Khalifa was initially intended to be entirely residential.