Morocco
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Abu Zayd Abd al-Rahman al-Jadiri
Fez, Morocco
Archival Overview
Preeminent 15th-century Moroccan astronomer and chief timekeeper (Muwaqqit) of the University of al-Qarawiyyin in Fez, author of the authoritative astronomical treatise Rawdat al-Azhar.
Biographical Record
Abu Zayd Abd al-Rahman ibn Abi Ghalib al-Jadiri al-Fasi was the premier practical astronomer of Marinid Morocco. Appointed Muwaqqit of the Grand Mosque of al-Qarawiyyin, he operated the famous mechanical water-clocks and astrolabes that regulated civil and religious time across Fez.
His master astronomical work, *Rawdat al-Azhar fi Ilm Waqt al-Layl wa al-Nahar* (The Garden of Flowers in the Science of Night and Day Timekeeping), provided precise algorithms and tables for solar altitude, shadow projection, and prayer times, studied for three centuries across North Africa.
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Final Resting Place
Perpetual MemorialFez, Morocco