 Abu al-Abbas Abdallah ibn Harun al-Rashid ; 14 Gunyana 786 9 Nyamavhuvhu 833, anonyanya kuzivikanwa nezita rake reumambo al-Mamun , ndiye mutongi wechinomwe weAbbasid, uyo akatonga kubva muna 813 kusvika parufu rwake muna 833. Akatsiva mukoma wake wokurera al-Amin mushure mehondo yevagari vemo, panguva iyo kubatana kweAbbasid Caliphate kwakakanganiswa nekumukira uye kusimuka kwevarume vane simba vemuno; yakawanda yekutonga kwake kwemumba yakadyiwa mumishandirapamwe yekunyaradza. Al-Mamun aiva munhu akadzidza chaizvo uye aifarira chaizvo zvidzidzo zveBhaibheri, saka ndiye akaita kuti pave neboka rainzi Translation Movement, iro rakaita kuti vanhu vafarire kudzidza uye sayenzi muBaghdad, uye ndiye akabudisa bhuku raAl-Khwarizmi iro rinozivikanwa seAlgebra. Iye anozivikanwawo nekutsigira dzidziso yeMutazilism uye nekuisa mutirongo Imam Ahmad ibn Hanbal, kusimuka kwekutambudzwa kwechitendero mihna, uye kutangazve kwehondo yakakuraneUmambo hweByzantium. 