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ʿAlam al-Dīn al-Ḥanafī
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ʿAlam al-Dīn al-Ḥanafī

Egyptian mathematician, astronomer, and engineer
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Quick Facts
Born:
1178?, Egypt
Died:
1251, Egypt

ʿAlam al-Dīn al-Ḥanafī (born 1178?, Egypt—died 1251, Egypt) was an Egyptian mathematician, astronomer, and engineer. He wrote a treatise on Euclid’s postulates, built water mills and fortifications on the Orontes River, and constructed the second-oldest existing Arabic celestial globe.

This article was most recently revised and updated by Encyclopaedia Britannica.