Vergilius of Salzburg was an 8th-century Irish clergyman, mathematician, and astronomer. Born in Ireland around 700, he received his education at the monastery of Iona before serving as the abbot of Aghaboe. He eventually moved to the European continent, where he acted as an advisor to Pippin the Younger. Throughout his career, he held significant leadership roles, including serving as the abbot of St. Peter's Abbey and later becoming the bishop of Salzburg in the late 760s.