Ferreolus of Vienne

Saint Ferreolus of Vienne (Ferréol) was a Roman military tribune, slain for faith in Christ at Vienne in Gaul in the time of the Emperor Diocletian, in 303 or 304.

According to tradition he was a Christian forced into the Roman army, and he had become tribune at Vienne. He tried to protect Saint Julian of Brioude and was imprisoned; he escaped from the prison and swam across the Rhône, but Roman soldiers overtook him on the banks of the Gier and killed him.

He is in the list of saints of the diocese of Grenoble-⁠Vienne, and many churches in France bear his name. He is commemorated on 18 September, as a saint of the undivided Church, by the New Calendar.