Ambrosius

Ambrosius was abbot of the monastery of Ile-⁠Barbe, near Lyon, then of the monastery of Saint-⁠Maurice of Agaunum, and died in 520. About the year 515 he was called by the abbot of Saint-⁠Maurice, Hymnemodus, to support him in the direction of the monastery and was its prior (prior or dean). At the death of Hymnemodus, the following year, he succeeded him as abbot. The monastery knew a "brilliant development", owing to his charitable and rigorous management.

He died in 520, probably on 2 November, and was buried in the abbey church that he had built. His name is in the Roman Martyrology on 2 November. His life and epitaph, like those of his predecessor and of his successor Achivus, were written by a disciple; the epitaph credits him with having established there perpetual praise, then unknown in the West. A saint of the undivided Church, venerated in the West.