Claudius of Vienne explained

Saint Claudius of Vienne (French: Claude de Vienne) was a bishop of Vienne in the Dauphiné, France, in the first half of the fifth century. He is considered a saint of the Roman Catholic Church.^[1]

He attended the Council of Orange in 441 and the Council of Vaison in 442.^[2]

Salvianus dedicated his work, now lost, on Ecclesiastes to Claudius.^[3]

His feast day is celebrated on 1 June. He is further celebrated on 1 July on the collective feast of all the bishop saints of Vienne with Saint Martin.^[4]

Notes and References

1. http://www.santiebeati.it/dettaglio/96972 Santiebeati.it - San Claudio di Vienne
2. Louis Duchesne, Fastes épiscopaux de l'ancienne Gaule. Provinces du Sud-Est (tome premier), vol. 3, Paris, Thorin et fils, 1894, p. 146 (online version)
3. Gennadius, De uiris illustribus, LXVII (PL 58, 1847, col. 1099A), cited in Gérard Lucas, Vienne dans les textes grecs et latins: Chroniques littéraires sur l'histoire de la cité, des Allobroges à la fin du Ve siècle de notre ère, MOM Éditions, coll. "Travaux de la Maison de l’Orient et de la Méditerranée", 2018,, pages 247–270: "Adon de Vienne, Chronique", esp. "Tableau récapitulatif de la liste des évêques de Vienne jusqu'à Avit", 122. col. 91D (online version)
4. https://www.diocese-grenoble-vienne.fr/histoire.html Diocese of Grenoble: Histoire