Abu Tahir Isma'il, better known by his regnal name al-Mansur Billah, was the thirteenth Isma'ili imam and third caliph of the Fatimid Caliphate in Ifriqiya, ruling from 946 until his death. He succeed
Gold dinar of al-Mansur, minted at his new capital, al-Mansuriya, in 949/50