List of tallest buildings and structures
The tallest artificial structure is Burj Khalifa, a skyscraper in Dubai that reached in height on January 17, 2009. By April 7, 2008 it had been built higher than the KVLY-TV mast in North Dakota, USA. That September it officially surpassed Poland's Warsaw radio mast, which stood from 1974 to 1991, to become the tallest structure ever built. Guyed lattice towers such as these masts had held the world height record since 1954.
Developments in Dubai
The Burj Khalifa (Arabic: برج خليفة for "Khalifa Tower") is a supertall skyscraper in the "Downtown Dubai" area of Dubai, United Arab Emirates. The building is part of a huge development located at the "First Interchange" (aka "Defense round-about") along Sheikh Zayed Road at Doha Street. Skidmore, Owings & Merrill LLP (SOM) of Chicago is the lead architect, structural engineer and mechanical engineer of the Burj. George J. Efstathiou of SOM is the Managing Partner on the project, while Adrian Smith, formerly of SOM, was the Design Partner. Third Party Review has been performed by CBM Engineers Inc. It is the tallest structure in the world.