The Maqam al-Imam Al-Ḥusayn ibn ‘Ali is the mosque and burial site of Al-Husayn ibn ‘Ali, the third Imam of Shia Islam, in the city of Karbala’, Iraq. It stands on the site of the Mausoleum of Imam Husayn, who was a grandson of Muhammad, near the place where he was martyred during the Battle of Karbala’ in 680 C.E.. The tomb of Imam Husayn is one of the holiest places for Shi‘ites, outside of Mecca and Medina, and many make pilgrimages to the site. Every year, millions of pilgrims visit the city to observe Ashura, which marks the anniversary of Imam Husayn's death.The Umayyad and Abbasid caliphs prevented construction of the shrines and discouraged pilgrimage to the sites. The tomb and its annexes were destroyed by Abbasid caliph Al-Mutawakkil in 850-851 and Shi'a pilgrimage was prohibited, but shrines in Karbala and Najaf were built by the Buwayhid emir 'Adud al-Daula in 979-80.