Mezue ahịrịokwu na-esonụ: Abu al-Abbas Abdallah ibn Harun al-Rashid (; 14 Septemba 786 <unk> 9 Ọgọst 833), nke a maara nke ọma site na aha ọchịchị ya al-Ma'mun (), bụ onye nke asaa Abbasid caliph, onye chịrị site na 813 ruo mgbe ọ nwụrụ na 833. Ọ nọchiri nwanne ya nwoke bụ al-Amin mgbe ọ nwụsịrị
agha obodo, n'oge nke ịdị n'otu nke Abbasid Caliphate na-adịghị ike site na nnupụisi na ịrị elu nke ndị isi obodo; ọtụtụ n'ime ọchịchị ya n'ime ụlọ na-eri na mkpọsa udo. Ebe ọ bụ na al-Ma'mun gụrụ akwụkwọ nke ọma, nweekwa mmasị dị ukwuu n'ihe ọmụmụ sayensị, ọ bụ ya mere ka e nwee òtù a na-akpọ Translation Movement, meekwa ka e nwee ọganihu n'ihe ọmụmụ sayensị na agụmakwụkwọ na Baghdad. A makwaara ya maka ịkwado nkuzi nke Mu'tazilism na maka ịtụ mkpọrọ Imam Ahmad ibn Hanbal, ịrị elu nke mkpagbu okpukpe ("mihna"), na ịmaliteghachi agha buru ibu na Alaeze Ukwu Byzantine.