Abbo of Fleury
monk and abbot of Fleury Abbey (c.945-1004)
Feast: 13 November (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Who they were
Abbo was born near Orléans about 945 and became a monk of the Benedictine monastery of Fleury-sur-Loire, notable for both learning and holiness. He studied philosophy, mathematics and astronomy, and early in life was called to England to direct the school of the new monastery of Ramsey.
Elected abbot of Fleury after a contested election settled in his favour by Gerbert, the future Pope Sylvester II, he became one of the great lights of the Church in the stormy times of Hugh Capet and the Ottos, trusted by Pope Gregory V. He died at Fleury on 13 November 1004.
The miracles
There was never a formal cause: he has been honoured as a saint since before the Church's formal processes began.
Why that counted as sanctity
A monk of learning and holiness who served the Church in a turbulent age.
Connected on this site
- Edmund the Martyr Saint“A series of coins commemorating him was minted from around the time East Anglia was absorbed by the kingdom of Wessex in 918, and in about 986, the French monk Abbo of Fleury wrote of his life and martyrdom.” — Wikipedia
- Oswald of Worcester Saint“While archbishop, he brought the scholar Abbo of Fleury to teach, and he spent two years in England, mostly at Ramsey.” — Wikipedia
- Catholic Encyclopedia (1913), via New Advent - Abbo of Fleury
- Wikidata Q306658 — dates, feast day and identifiers (CC0)
- English Wikipedia — Abbo of Fleury (CC BY-SA)
Checked against the sources listed on 21 September 2026. Corrections welcome.