Al-Mustansir I

Abu Ja'far al-Mansur ibn al-Zahir (17 February 1192 – 2 December 1242), commonly known as al-Mustansir, was the 36th Abbasidcaliph, ruling from 1226 to 1242. He succeeded al-Zahir as caliph in the year 1226, and was the penultimate caliph to rule from Baghdad. He was the second-to-last caliph of the Abbasid Caliphate.