Abbo of Auxerre

Abbo of Auxerre (also rendered Abbon) was a ninth-century Benedictine monk, abbot, and bishop of the see of Auxerre in Burgundy, in the West Frankish kingdom. No reliable source records his year or place of birth, and almost nothing is known of his childhood or education. He is attested as a monk of the Abbey of Saint-Germain d’Auxerre, the great Carolingian house that had grown up around the tomb of Saint Germanus of Auxerre. That monastery was, in his lifetime, a prominent centre of Benedictine observance and of the scholarly culture associated with the later Carolingian renaissance in Burgundy. Within the community Abbo rose to become abbot. The principal medieval notices of the bishops of Auxerre, above all the local Gesta pontificum Autissiodorensium compiled in the later ninth century, treat him as a member of this monastic milieu rather than as a figure whose earlier career can be reconstructed in detail.

He was the brother of Heribald (Heribaldus), who occupied the bishopric of Auxerre for several decades in the first half of the ninth century, conventionally from the 820s until about 857. Upon Heribald’s death Abbo succeeded him as bishop, an instance of the close ties that often bound the cathedral see of Auxerre to the abbey of Saint-Germain. His episcopate was short. Standard episcopal catalogues place him on the see from about 857 until 859, when he resigned. The surviving record does not explain the resignation in political or personal terms; later liturgical and hagiographical tradition presents it as a return from pastoral office to the cloister. After laying down the bishopric he resumed monastic life and died in 860, the date given with unusual consistency in medieval and modern notices. His death is associated with Auxerre and with the community he had governed as abbot.

Abbo was venerated locally as a saint. His feast was kept on 3 December, the day traditionally assigned to his death, and he appears in later martyrologies and Benedictine calendars as bishop and confessor. There is no evidence of a formal papal canonization; his cult belongs to the pre-congregation pattern of episcopal and monastic recognition of holiness. No medieval source that can be checked assigns him a list of patronages of places, trades, or causes. The place of his burial is not independently confirmed in the notices used here, though interment at Saint-Germain d’Auxerre would be consistent with his monastic affiliation and with the burial customs of that church.

The historical dossier is thin even by ninth-century standards, and Abbo of Auxerre must be kept distinct from better-documented namesakes: Abbo of Fleury, the scholar-abbot killed in 1004, and Abbo Cernuus, the monk-poet of Saint-Germain-des-Prés at Paris. What can be said with confidence is that Abbo belonged to the Carolingian church of Burgundy, combined the offices of Benedictine abbot and diocesan bishop in the manner of his age, held the see of Auxerre only briefly after his brother, and was remembered in his own city as a holy bishop who ended his life as a monk.