c.786 - 833
Arab Caliph

Al-Mamun was the son of Harun al-Rashid. He was the greatest patron of philosophy and science in the history of Islam. He encouraged on holding disputes in court on logical, theological, and legal matters.

Al-Mamun established in Baghdad his famous 'Bayt al-Hikmah' (House of Wisdom), combining a library and an academy. The library contained books on all subjects, such as literature, natural sciences, and logic.

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