Kingdom Center also called Al Mamlaka Tower (Arabic: برج المملكة) is a skyscraper located in the city of Riyadh, Saudi Arabia. It is the tallest skyscraper in Saudi Arabia (will be surpassed by Abraj Al Bait Towers) and the 56th tallest building in the world with a height of 302.3 m (992 ft). It's also the third tallest building with a hole in the world (after SWFC and Tuntex Sky Tower). It is also host to the highest mosque in the world after the mosque in the Burj Khalifa. AL-Mamlka Tower contains a total of 99 floors and 2 basement levels. AL-Mamlka Tower is owned by Prince Al-Waleed bin Talal, a prince of the Saudi royal family. It is also the headquarters of his holding company: Kingdom Holding Company. The total cost of the project was US$ 1 billion and the contract was taken by Saudi Arabian Al-Seif and The Italian Impregilo.
AL-Mamlka Tower is situated on Al-Urubah Road between King Fahd Road and Olaya Road in the growing business district of Olaya in Riyadh. AL-Mamlka Tower was the winner of the 2002 Emporis Skyscraper Award, selected as the "Best skyscraper of the world for design". A five-level shopping center, which also won a major design award, fills the eastern tube. The large opening reddens when filled by workers and changes in hue throughout the month.
Besides the shopping mall, AL-Mamlka Tower contains the Four Seasons Hotel Riyadh and state-of-the-art apartments. The 56 m (184 ft) long skybridge atop the skyscraper, at a height of 290.4 m (953 ft) top floor, contains a public observation deck and a view of the entire city of Riyadh. The ellipse motif taken from the tower's footprint appears also in the light fixtures, ceiling panels, entrance canopy, wastebins, and furniture. AL-Mamlka Tower is in direct axis with Riyadh's other skyscraper the Al Faisaliyah Center. It forms a most exquisite silhouette in the evening sky.