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Rashid al-Din Hamadani was a Persian historian, philosopher, vizier, and advisor to the Ilkhanate ruler Ghazan Khan. Hamadani served as the vizier of Ghazan Khan from 1295 to 1318, during which time he oversaw the compilation of the Jami al-Tawarikh, a massive historical encyclopedia. Hamadani was a prolific writer and scholar, and his work had a significant influence on the development of Persian literature and historiography.