Adrian D. Smith
Adrian D. Smith (born 1944) is an American architect. He is famous for designing buildings like the skyscrapers: the Burj Khalifa, the Jin Mao Tower and the Trump International Hotel and Tower. The Burj Khalifa, in Dubai, is considered the World’s Tallest Building. Smith has also made the Broadgate Tower in London and the Nanjing Greenland Financial Center in China. The Pearl River Tower in Guangzhou, China, another Smith's design will be ready in 2011.
Chicago based practice Adrian Smith + Gordon Gill has recently unveiled plans to construct the Kingdom Tower in Jeddah, Saudi Arabia. Projected to become the world's next tallest building, it will be the primary component within the kingdom city development intended to revive the city's urban core. the slender form is conceptually derived from the fronds of a native flower emerging from the arid desert sand. The mixed use program will accommodate a four seasons hotel, apartments, office space, luxury condominiums and the world's highest observatory overlooking the adjacent Red Sea. 
The Kingdom Tower, a $1.2 billion development and a total construction area of 530,000 square meters (5.7 million square feet), will be at least 568 feet taller than the Burj Khalifa.