John Healy, Insula Sanctorum et Doctorum; Or…
“ Keating is, so far as we know, the first who calls Cormac, not Bishop, but Archbishop of Cashel. In fact down to the year A.D. 1101, Cashel was simply a royal dun, which gave its name to the kingdom of South Munster. There was up to that time no church or monastery at Cashel, of which we have any information. But in that year a remarkable event took place, thus recorded by the Four Masters: “A meeting of Leath Mogha was held at Caiseal by Muircheartach O’Briain with the chiefs of the laity, and O’Dunan, noble bishop and chief senior with the chiefs of the clergy ”
