Nicetius

Nicetius (Nizier, Nicetas) was bishop of Vienne, the fourteenth in the catalogue of Ado (799-875). Ado places him towards the end of the 4th century, but he probably ascended the see around 449, after Nectarius, being attested in a letter of Pope Leo of August 449, confirming the ordination of Ravennius as bishop of Arles. According to the tradition taken up by Ulysse Chevalier, Florentinus II would have succeeded him; historically his successor is Mamertus.

The Roman Martyrology commemorates him on 5 May as bishop of Vienne, a man venerable for his sanctity; the Martyrology of Ado and the Hieronymian one had him on the same date, as well as his predecessor Nectarius. In the calendar of the diocese of Grenoble-⁠Vienne he is commemorated on 1 July, together with Saint Martin and all the ancient bishops of Vienne. A saint of the undivided Church, venerated in the West.