John Pediasimos (Greek: Ιωάννης Πεδιάσιμος; ca. 1250 – early 14th century), also known as John Pothos, was a Byzantine churchman, scholar, astronomer, mathematician, mythologist, syllogistic, musician, and physician active at Constantinople, Ohrid and Thessalonica.
John was born about 1250, and for the first few years of his life studied in Constantinople under the teachers Manuel Holobolos and George Akropolites. Gregory of Cyprus was a fellow pupil. After his studies he was a given the prestigious position of hypatos ton philosophon. He later served as chartophylax in the Archbishopric of Ohrid (ca. 1280), where he also taught. If his identification with a certain megas sakellarios John Pothos is correct, by 1284 he was in Thessalonica. John wrote on many subjects on his fields of study.
- Talbot, Alice-Mary (1991). "Pediasimos, John". Oxford Dictionary of Byzantium. Oxford University Press. p. 1615. ISBN 0198140983.
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