If a Middle East prince has his way, Saudi Arabia will someday be home to the world's tallest building. Alwaleed Bin Talal Bin Abdulaziz recently unveiled a scheme for a 5.3-sq-kilometer city north of Jeddah that would include a mixed-use supertower designed to reach more 1 km above the desert floor.
Kingdom Tower, under design by Adrian Smith + Gordon Gill Architecture, with structural engineer Thornton Tomasetti, would enclose 530,000 sq m. The skyscraper is expected to cost $1.2 billion. The main contractor on the project is the Saudi Binladin Group. According to the architect, the foundations are designed, and the contract for the piles is already under tender. The Kingdom City development is expected to cost $20 billion.