Al-Musta'sim, Iraqi caliph (born 1213)

Al-Musta'sim

37th and last Abbasid Caliph (r. 1242–1258)

Abu Ahmad Abdallah ibn al-Mustansir bi'llah, better known by his regnal title Al-Mustaʿṣim bi-llāh, was the 37th and last caliph from the Abbasid dynasty ruling from Baghdad. He held the title from 1242 until his death in 1258.