The Burj Khalifa known as the Burj Dubai before its inauguration,

It is the tallest structure in the world, standing at 829.8 m, far taller than the previous record holder, Taipei 101.

Construction of the Burj Dubai began in 2004, with the exterior completed 5 years later in 2009.

Delay Emaar Properties announced on 9 June 2008 that construction of

Burj Khalifa was delayed by upgraded finishes and would be completed only in September 2009  A revised completion date of 2 December 2009 was then announced.However, Burj Khalifa was opened on 4 January 2010, more than a month later

BURJ KHALIFA IN NUMBERS  95 : distance in km at which its spire can be seen  504 : rise in metres of its main service lift  57 : number of lifts  49 : number of office floors  1,044 : number of residential apartments  900 : length in feet of the fountain at the foot of the tower, the world's tallest performing fountain  28,261 : number of glass cladding panels on the exterior of the tower

 Burj Khalifa: The world's tallest buildingThe Burj Khalifa, the newly-opened Dubai tower, is a multiple record breaker.As well as becoming the tallest building in the world, the skyscraper is the tallest structure and boasts the most storeys and highest occupied floor. Its 124th floor outdoor observation deck is also the world's highest, and its elevators will travel the longest distance.The $1.5bn tower is more than twice the size of the Empire State Building and its construction took thousands of workers six years to complete. 

Tallest existing structure: 829.8 m (previously KVLY-TV mast – 628.8 m) Tallest structure ever built: 829.8 m (previously Warsaw radio mast – 646.38) Tallest freestanding structure: 829.8 m (previously CN Tower – 553. m o3 m) Tallest skyscraper (to top of spire): 829.8 m (previously Taipei 101 – 509.2 m) Tallest skyscraper to top of antenna: 829.8 m (previously the Willis (formerly Sears) Tower – 527 m ) Building with most floors: 211(including spire) previously World Trade Center – 110 Building with world's highest occupied floor: 584.5 m World's highest elevator installation (situated inside a rod at the very top of the building) World's longest travel distance elevators: 504 m Highest vertical concrete pumping (for a building): 606 m World's tallest structure that includes residential space World's highest observation deck: 148th floor at 555 m World's highest outdoor observation deck: 124th floor at 452 m World's highest installation of an aluminum and glass facade: 512 m World's highest nightclub: 144th floor World's highest restaurant (At.mosphere): 122nd floor at 442 m (previously 360, at a height of 350 m

in CN Tower) World's highest New Year display of fireworks.

1. The tower is composed of three elements arranged around a central core. The design is said to be based on the desert flower Hymenocallis native to the region2. The Y-shaped floor plan aims to maximize views of the Gulf. As the building rises, its floor space decreases in size3. The building's core also features double-decker elevators, said to be some of the fastest in the world.Source: Emaar/Reuters