Ulugh Beg

Ulugh Beg was a 15th-century Timurid ruler, mathematician, and astronomer who founded the Samarkand observatory and commissioned a major star catalogue.

Samarkand Observatory: A 15th-century astronomical observatory in Samarkand, built under Ulugh Beg’s patronage. Its monumental instruments enabled the observations behind his catalogue.
Timurid Empire: A Central Asian and Persianate empire founded by Timur in the late 14th century. Ulugh Beg ruled a major Timurid center and drew resources from its court.
Qadi Zada al-Rumi: A mathematician and astronomer who taught and collaborated with scholars at Ulugh Beg’s Samarkand court. He helped train the scholars who carried out the observatory’s work.
Timur: A Central Asian conqueror who founded the Timurid dynasty and built an empire in the late 14th century. His dynasty created the political and cultural inheritance in which Ulugh Beg ruled.
Ali Qushji’s Migration to Constantinople: The 15th-century relocation of astronomer Ali Qushji from Central Asia to the Ottoman capital. His move helped carry Samarkand’s mathematical astronomy into Ottoman scholarly circles.
Zij-i Sultani: An astronomical handbook compiled at Samarkand under Ulugh Beg, containing star positions and planetary tables. It preserves the principal results of his astronomical program.
Islamic Golden Age: A period of flourishing scholarship across parts of the Islamic world, especially from the eighth to the thirteenth centuries. Earlier astronomical works and institutions formed part of the inheritance available to Samarkand scholars.
Jamshid al-Kashi: A Persian mathematician and astronomer who worked at the Samarkand court in the early 15th century. His mathematical expertise contributed to the court’s scientific culture before his death.
Samarkand: A historic city in present-day Uzbekistan that served as a major center of Timurid rule and learning. Ulugh Beg made the city the center of his court and astronomical work.
Taqi al-Din Observatory: An Ottoman astronomical observatory founded in Constantinople in 1577 and demolished in 1580. Its later program belongs to the observatory tradition that Ulugh Beg helped establish.

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