Abd-ar-Rahman III ('Abd ar-Rahman ibn Muhammad ibn 'Abd Allah ibn Muhammad ibn 'abd ar-Rahman ibn al-Hakam ar-Rabdi ibn Hisham ibn 'abd ar-Rahman ad-Dakhil; ; 11 January 889/91 – 15 October 961) was the Emir and Caliph of Córdoba (912–961) of the Umayyad dynasty in al-Andalus. Called al-Nasir li-Din Allah ("the Defender of God's Faith"), he ascended the throne in his early 20s, and reigned for half a century as the most powerful prince of Iberia. Although people of all creeds enjoyed tolerance and freedom of religion under his rule, he repelled the Fatimids, partly by supporting their Maghrawa enemies in North Africa, and partly by claiming the title Caliph (ruler of the Islamic world) for himself.