المسجد الحرام
Adorning the southern facade of the Masjid al-Haram, the Abraj al-Bait Complex, which towers over the Great Mosque, is a seven-building complex with the central clock tower having a length of 601 m (1,972 feet), making it the world's fourth-tallest building. All seven buildings in the complex also form the third-largest building by floor area.