Pedzisa mutsara unotevera: Abu al-Abbas Abdallah ibn Harun al-Rashid (; 14 Gunyana 786 <unk> 9 Nyamavhuvhu 833), anozivikanwa zvakanyanya nezita rake rekutonga al-Ma'mun (), ndiye mutongi wechinomwe weAbbasid, uyo akatonga kubva muna 813 kusvika parufu rwake muna 833. Akakunda munun'una wake wokubereka Al-Amin mushure mokunge
hondo yevagari vemo, panguva iyo kubatana kweAbbasid Caliphate kwakakanganiswa nekumukira uye kusimuka kwevarume vane simba vemuno; yakawanda yekutonga kwake mudzimba yakadyiwa mumishandirapamwe yekunyaradza. Al-Ma'mun 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 se"Algebra". Iye anozivikanwawo nekutsigira dzidziso yeMu'tazilism uye nekuisa mutirongo Imam Ahmad ibn Hanbal, kusimuka kwekutambudzwa kwechitendero ("mihna"), uye kutangazve kwehondo yakakura neByzantine Humambo.