He became bishop in 451 at the latest.
Gregory of Tours reports that he had built a
church dedicated to
Saint Symphorian in
Autun. He was a friend of Bishop
Lupus of Troyes. note that around the year 470 he accompanied the
bishop of Lyon and other prelates to
Chalon-sur-Saône to consecrate a new bishop. Also in 472, Sidonius wrote to him to attend the consecration of the new
bishop of Bourges. In 453 Euphronius composed a letter, now lost, to the
bishop of Angers, Talasius. It is reproduced in the
Concilia Antiquae Galliae. Around 470, when
Bishop Perpetuus of Tours was building a new church to house the remains of
Martin of Tours, Euphronius sent marble for the cover of the saint's tomb. Euphronius was buried in the graveyard of the
Abbey of St. Symphorian, Autun; his name is in the
Roman Martyrology for August 3. ==References==