Al-Mustansir I
Abu Ja'far al-Mansur ibn al-Zahir, commonly known as al-Mustansir I, was the 36th Abbasid caliph, 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.
Biography
Al-Mustansir was born in Baghdad on 1192. He was the son of Abu Nasr Muhammad. His mother was a Turkish Umm walad. called Zahra. His full name was Mansur ibn Muhammad al-Zahir and his Kunya was Abu Jaʿfar. At the time of his birth, his father was a prince. When his father ascended to the throne in 1225. His father, lowered the taxes of Iraq, and built a strong army to resist invasions. He died on 10 July 1226, nine months after his accession.On his father's death in 1226 he has succeeded his father Az-Zahir as the thirty-sixth Abbasid caliph in Baghdad. Al-Mustansir is particularly known for establishing the Mustansiriyya Madrasa in 1227/32/34. The Madrasa, at the time, taught many subjects including medicine, mathematics, literature, grammar and Islamic religious studies, becoming a prominent and high-ranking center for Islamic studies in Baghdad.
The Madrasas during the Abbasid period were used as the predominant instrument to foster the spread of Islamic thought as well as a way to extend the founder's pious ideals.The ruler of Erbil, Muzaffar ad-Din Gökböri was being without a male heir, Gökböri willed Erbil to the Abbasid caliph al-Mustansir. After the death of Gökböri in 1233, the Erbil city came under Abbasid control.
Al-Mustansir died on 5 December 1242. His son Al-Musta'sim succeeded him as the thirty-seventh and last Caliph of the Abbasid Caliphate.