John de Sacrobosco

(c. 1161—1236) mathematician

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(fl.c.1250); His vernacular name was probably John of Holywood. He was the author of a short treatise on ‘the [heavenly] sphere’ (De sphaera) which was the standard textbook of elementary astronomy. Many astronomers published commentaries on it.

From The Oxford Dictionary of the Renaissance in Oxford Reference.

Subjects: Early Modern History (1500 to 1700).

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