The Roman Catholic Church also ranks him as a saint, with a feast day on 23 July. Like his contemporaries Augustine of Hippo and John Chrysostom, he was never formally canonized, a process that came into use several centuries after his death. Pope Urban V referred to him as "sanctus" (a saint) and he was included in the Gallican Martyrology He is included also in the Roman Martyrology with a feast-day on 23 July. In the Irish church, at the beginning of the ninth century, Cassian was commemorated on 25 November, as indicated in the Martyrology of Óengus: "Lasin nEoin Cassian assa érchain corann" (With John Cassian whose crown is very fair). Like the great majority of recognized saints of the church, he is not one of the saints in the General Roman Calendar, but the Archdiocese of Marseilles and some monastic orders celebrate his memorial on his feast day.