Abbasid Caliph
794 CE to 842 CE
Abu Ishaq 'Abbas al-Mu'tasim ibn Harun (794 – 5 January 842) is an Abbasid caliph (833–842).
He succeeds his half-brother al-Ma'mun.
In Arabian communities, al-Mu'tasim is an example of caliphal magnanimity, because of the famous incident "Wa Mu'tasimah".
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