Saint Austremonius of Clermont (3rd century)

The oldest source is Gregory of Tours (538-594). In the History of the Franks (I, 30), he reports that, under the emperor Decius, seven bishops were sent to evangelize Gaul: Gatian at Tours, Trophimus at Arles, Paul at Narbonne, Saturninus at Toulouse, Denis at Paris, Martial at Limoges and Austremonius at Clermont.^[6]

In On the Glory of the Confessors (chapter 30), Gregory recounts miraculous episodes about Austremonius (healings, deliverances) located around his tomb. These accounts belong to the witness of local devotion in the sixth century, not to a contemporary record.^[7][8]

An uncertain dating

The framework “seven bishops under Decius around 250” is a reconstruction by Gregory of Tours, who writes more than three centuries after the events. The historian Gabriel Fournier, in an article in the Bulletin historique des diocèses d'Auvergne (1979), showed that it is more plausible to place the lasting evangelization of Auvergne in the generation of the Aquitanian bishops present at the Council of Arles in 314. The two readings coexist: the liturgical tradition keeps the third century, historical criticism leans towards the beginning of the fourth.^[9][10]

We keep here both degrees of certainty, without deciding: the mission of Austremonius is ancient (third or early fourth century), his see at Clermont is the received tradition, but the precise date and the link with the persecution of Decius are not historically demonstrated.

According to tradition, Austremonius preaches in Auvergne, establishes the Christian community of Clermont (Augustonemetum) and carries the Gospel into the surrounding countryside. Late texts attribute foundations, healings and conversions to him; these accounts belong to the hagiographical legend and have no documentary confirmation.^[11][12]

Tradition attributes to him a martyrdom by beheading. The place and date are not determined with certainty: the texts diverge, and no contemporary document allows them to be fixed. We take up no detail of the martyrdom beyond this observation.^[13][14]

The late legends

Much later texts present Austremonius as a disciple of Christ, or as a Jew of Emmaus converted. These traditions are legendary: they rest on no ancient witness and are incompatible with even the shortest chronology of the mission (third century). They testify to local devotion, not to history.^[15]

The real name of the saint would have been Stremonius. The form “Austremonius” (Austremonius) became established in the French liturgical tradition; it is judged “traditional, but inaccurate” by historians.^[16]

The tomb of Austremonius is first placed at Issoire, where a church is dedicated to him. The relics are then translated to the abbey of Mozac, near Riom, which becomes the main sanctuary. The head remains at Issoire, in the church that bears his name.^[17][18]

The dates of translation (761, 764, 848 according to the texts) are uncertain and the sources do not agree. We report them as traditional without presenting them as established.^[19]

The church of Saint Austremonius at Issoire, with its capitals and hagiographical scenes, is one of the major monuments of Auvergnat Romanesque art. It preserves the memory of the martyr and constitutes the main place of pilgrimage with Mozac.^[20]

Saint Austremonius is celebrated on 1 November, the date retained in the calendar of the saints of the day. The diocese of Saint-Flour celebrates him on 8 November. His cult is ancient in Auvergne; he is the patron of several parishes and localities of the region.^[21]

The iconography most often represents him as a bishop (mitre, crozier), sometimes with the attribute of martyrdom (palm, sword). Stained glass windows show him in several churches of Auvergne, notably at Sermentizon and in the Sainte-Chapelle of Vic-le-Comte. The church of Issoire dedicates capitals and scenes of his life to him.^[22]

The ancient sources are Gregory of Tours, History of the Franks I, 30 and On the Glory of the Confessors ch. 30 (sixth century). The Bollandists published the life and the lessons in the Acta Sanctorum, Novembris t. I (1887). The modern reference study is that of Gabriel Fournier (1979, p. 417-471), which places the evangelization of Auvergne in the context of the Aquitanian bishoprics of the fourth century.^{[23][24][25][26]}

What cannot be affirmed with certainty: the dates of birth and death, the place and date of the martyrdom, the date of the translations of relics, and the detailed circumstances of the mission. The traditions that make Austremonius a disciple of Christ belong to legend. We have added no detail to the file: neither invented speech, nor prodigy reported beyond what the sources cite.

• Saint Gatian of Tours: one of the seven bishops of the Gregorian tradition.
• Saint Martial of Limoges: another bishop of Gaul from the same tradition.
• Saint Remigius of Reims: central figure of the Church of Gaul at the junction of antiquity and the early Middle Ages.