John Cassian, while he was in Rome,…
415 CE
John Cassian, while he was in Rome, had accepted Pope Innocent’s invitation to found an Egyptian-style monastery in southern Gaul, near Marseille.
He may also have spent time as a priest in Antioch between 404 and 415.
Whatever the case, he arrives in Marseille around 415.
His foundation, the Abbey of St. Victor, is a complex of monasteries for both men and women, one of the first such institutes in the West, and will serve as a model for later monastic development.