The Imam 'Ali Holy Shrine , also known as Masjid Ali or the Mosque of 'Ali, located in Najaf, Iraq, is the third holiest site for some of the estimated 200 million followers of the Shia branch of Islam. 'Ali ibn Abi Talib, the cousin of Muhammad, the first Imam (according to Shia belief) and fourth caliph (according to Sunni belief) is buried here. According to Shi'a belief buried next to Ali within this mosque are the remains of Adam and Noah. Each year millions of pilgrims visit the Shrine and pay tribute to Imam Ali.