Johannes de Sacrobosco
Monastic
Johannes de Sacrobosco, also written Ioannes de Sacro Bosco, later called John of Holywood or John of Holybush, was a scholar, monk, and astronomer who taught at the University of Paris.
He wrote a short introduction to the Hindu-Arabic numeral... Wikipedia
Born: 1195, England, United Kingdom
Died: 1256 (age 61 years), Paris, France