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He seems to have spent the rest of his life in Shiraz. Hafiz, another famous poet and mystic was also born in Shiraz. A number of scientists also originate from Shiraz. Qutb al-Din al-Shirazi, a 13th-century astronomer, mathematician, physician, physicist and scientist was from Shiraz. In his The Limit of Accomplishment concerning Knowledge of the Heavens, he also discussed the possibility of heliocentrism.