A Persian astronomer whoserved the Yuan Dynasty ( JQ ).
The Yuan Dynasty valued Islamic astrology and actively adopted Islamic achievements.
Jamal al-Din was appointed as one of the two directors in charge of the Astro- nomical Bureaus.The Islamic Astronomical Bureau existed through the end of the Yuan Dynasty.
riod through different dynasties up until the Yuan Dynasty.
From then on, it continued to serve as a gateway to the Western Regions throughout the Northern and Southern Dynastiesand down totheSui,Tang,Song and Yuan Dynasties, where the Eastern and West-
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