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Mahmud ibn Muhammad died in 1824.
It was established by Abu Jafar Al-Mansur, the second Abbasid ruler.
Baghdad Was Built BY Abassid Caliphate Abu Jafar Al-Mansur in 762 A.D
Abu Hatim Muhammad ibn Idris al-Razi died in 890.
Abu Hatim Muhammad ibn Idris al-Razi was born in 811.