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al-Ma'mun
Abbasid Caliph
Years: 786 - 833
Abū Jaʿfar Abdullāh al-Māʾmūn ibn Harūn (also spelled Almamon, Al-Maymun and el-Mâmoûn) (13 September 786 – 9 August 833) is an Abbasid caliph who reigns from 813 until his death in 833.
He succeeded his brother al-Amin.
