Gennadius
Victorius
Victorius of Aquitaine, a careful reckoner, at the invitation of Saint Hilary, bishop of Rome, composed a Paschal cycle after the most careful investigation, following his four predecessors, that is, Hippolytus, Eusebius, Theophilus and Prosper. He extended the series of years to the five hundred and thirty-second year, reckoning in such a way that in the five hundred and thirty-third year the Paschal festival would fall again in the same month, on the same day and with the same moon as in that first year when the Passion and resurrection of our Lord took place.