Al Mustansir (Baghdad)

Al-Mustansir Bi'llah (full name:Abû Ja`far al-Mustansir bi-llah al-Mansûr ben az-Zâhir Surname Al-Mustansir) was born in Baghdad on 1192. On his father's death in 1226 he has succeeded his father Az-Zahir as the thirty-sixth Abbasid Caliph. Al-Mustansir died on 5 December 1242. His son Al-Musta'sim succeeded him as the caliph.

Mustansiriya Madrasah, was established in 1227 (or 1232/34 A.D. by some accounts) by the Abbasid Caliph Al-Mustansir and was one of the oldest universities in the world. Its building, located on the left bank of the Tigris River, survived the Mongol invasion and has been restored.