Saint Mark and Saint Marcellian (Third Century) Jun 18, 2000 The Slaves of the Immaculate Heart of Mary They were twin brothers and deacons of the Church at Rome who were martyred under Diocletian. Saints Mark and Marcellinus being led to Martyrdom,by Paolo Veronese (1528–1588) source Share this:TweetWhatsAppShare on TumblrTelegramPocketLike this:Like Loading... Related