In response, the Holy See sent St. Germanus of Auxerre to combat the heresy.
Around 430, Pope Celestine I consecrated Palladius a bishop, and sent him into Ireland as its first bishop, preceding St. Patrick.
Though not too successful with the Irish, he built three churches in Leinster.
Leaving Ireland, Palladius sailed for Scotland where he preached among the Picts.
He died at Fordum, near Aberdeen a short while after arriving.