According to an ancient legend, he was one of the seventy-two disciples of Christ, and was sent to Gaul by Saint Peter as bishop, together with the deacon Valerius and the subdeacon Maternus, to preach the Gospel.
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The staff of St. Peter, with which he had been raised to life, was preserved at Cologne until the end of the 10th century when the upper half was presented to Trier, and was afterwards taken to Prague by Emperor Charles IV.
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Following Hontheim, Calmet and others, the Bollandists, with Marx, Aloys Lütolf, and other historians refer these bishops of Trier to a period following 250, though not all of them consider this as fully established.