Christian-Muslim Relations 600 - 1500

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Abū l-ʿAbbās ʿAbdallāh ibn Hārūn al-Maʾmūn
(416 words)

The Caliph al-Maʾmūn

Date of Birth: 786

Place of Birth: Baghdad

Date of Death: 833

Place of Death: Tarsus


As his name indicates, ʿAbdallāh ibn Hārūn was the son of the Caliph Hārūn al-Rashīd. Declared second heir after his brother al-Amīn, he established himself as governor of Khurāsān during his brother's caliphate. In 810, tensions between the two erupted into open hostility, and by 813…

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Thomas, David, “Abū l-ʿAbbās ʿAbdallāh ibn Hārūn al-Maʾmūn”, in: Christian-Muslim Relations 600 - 1500, General Editor David Thomas. Consulted online on 25 November 2020 <>
First published online: 2010

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