Abbo of Fleury was a Benedictine monk and scholar who lived in France from approximately 945 to 1004. Educated in Paris and Reims, he became a significant figure in medieval intellectual life, specializing in mathematics, philosophy, and astronomy. He served as the abbot of Fleury Abbey and spent time in England, where he helped reform monastic systems. A versatile thinker, he was also a diplomat who traveled to Rome to represent the interests of King Robert II.