his accession. He was succeeded his son (al-Nasir's grandson) al-Mustansir. See also al-Sarai Mosque Shihab al-Din 'Umar al-Suhrawardi designated as Shaykh al-Islam by al-Nasir. Baghdad School also known as the Arab school was an influential school of Islamic art developed during the late 12th century in the Abbasid capital Baghdad. References Sources This text is partly adapted from William Muir's public domain, The Caliphate: Its Rise, Decline, and Fall. Hartmann, Angelika. An-Nasir li-Din Allah: Politik, Religion und Kultur in der späten Abbasidenzeit. 1158 births 1225 deaths Arab Muslims 12th-century Abbasid caliphs 13th-century Abbasid caliphs Muslims of the Third Crusade Muslims of the Fifth Crusade Shafi'is Sons of Abbasid caliphs