Here is the info about Kingdom Tower. source wikipedia
The Kingdom Tower is a 41-storey, 302.3 m (992 ft) skyscraper in Riyadh, Saudi Arabia. It is the third tallest skyscraper in the country after the Abraj Al Bait Towers and the Burj Rafal, and is the world's third tallest building with a hole after the Shanghai World Financial Center and Tuntex Sky Tower.
Besides the shopping mall, Kingdom Tower contains the Four Seasons Hotel Riyadh and apartments. There is a 56 m (184 ft) skybridge atop the skyscraper.
The building is situated on 100,000 square metres site with carparking for 3,000 vehicles.
The upper third of the tower features an inverted parabolic arch. The building utilises butt jointed glazing combined with the lack of both distinguished floor lines and other tall buildings around it. The lower two thirds were constructed with a reinforced concrete frame while the top third has a tubular steel frame
