According to the 1962 Missal of St. John XXIII the Extraordinary Form of the Roman Rite, today is the feast of St. Marcellus who was elected Pope just at the time when Diocletian had spent somewhat his first violence against the Church. In Rome he reorganized the Catholic hierarchy disrupted by the persecution. He was exiled and put to labor. He is considered a martyr as he died in 309 because of his treatment during his exile.