ʿAlam al-Dīn al-Ḥanafī
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.
Citation Information
Article Title:
ʿAlam al-Dīn al-Ḥanafī
Website Name:
Encyclopaedia Britannica
Publisher:
Encyclopaedia Britannica, Inc.
Date Published:
01 January 2026
Access Date:
November 14, 2026