Marcellinus and Peter were Roman citizens, martyred during the reign of Diocletian about the year A.D. 303. Both were in the service of Christ and His Church: Marcellinus was a priest and Peter an exorcist. At the same period Erasmus, or Elmo, Bishop of Formiae in Campania, gave his life for His Master. St. Elmo was widely venerated during the Middle Ages as the patron of sailors, and as one of the Fourteen Holy Helpers in time of need.
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