The Saudi government funded construction of the Abraj Al-Bait complex, a set of seven massive hotels whose central tower reaches a height of 1,972 feet. The complex overlooks the Great Mosque of Mecca, which contains the Kaaba (the holiest place in Islam) and was built to offer modern accommodations to Muslims participating in the annual Hajj, or pilgrimage to Mecca. The Abraj Al-Bait, whose name means 'Tower of the House' in Arabic, contains the world's largest clock face (over 140 feet in diameter) and as of 2019 is the world's most expensive building, with construction costs exceeding $15 billion. The complex was built by the Saudi Binladin Group, a company founded by Osama bin Laden's father.