King Diarmaid Mac Cerbhaill reigned from A.D. 544 to A.D. 564 or 565. His high steward, when going round the country to enforce the ancient laws of hospitality, was slain by Aedh Guaire at his Dun in Hy-Many. Guaire fled to escape the vengeance of the king, and took refuge with his uncle, St. Ruadhan of Lorrha, on the other side of the Shannon. But the king discovered his retreat, and dragged off the criminal to Tara to be punished for his crime. Ruadhan closely followed, and begged his neighbour, St. Brendan, who had by this time founded Clonfert on the Shannon in Hy-Many, to accompany him. Brendan did so; and thus both saints, with their clerics, and their bells, and their croziers, came to Tara to intercede for the criminal. But the king was obdurate, and refused to release his prisoner. All the courtiers joined the bishops in asking his pardon, but Diarmaid still refused. Then Ruadhan of Lorrha and "another bishop who was with him," incensed with the king for his obduracy, "took their bells that they had, which they rung hardly, and cursed the king and the place, and prayed God that no King or Queen would or could ever dwell in Tara, and that it should be waste for ever, without court or palace, and so it fell out accordingly."[184] Next year the king was slain, and after him no king or queen ever reigned again in Tara. The spot where Ruadhan and Brendan stood, when pronouncing this dreadful excommunication, was on the Rath of the Synods, which is still shown on Tara Hill. St. Brendan founded one church at least in Leinster at a place called Cluain Imaire, now Clonamery, in the co. Kilkenny. It stands on the left bank of the river Nore, about two miles below Inistiogue. Brandon Hill rises a little to the east of the old church, whose ruins are still to be seen, and show it to have been of the most primitive type of church architecture. Brendan, also, probably at an earlier date, founded two still more celebrated establishments in the West of Ireland even before founding Clonfert, which has always borne his name. The first of these was the celebrated monastery of Annaghdown, on the shore of Lough Corrib, which he founded for his sister, St. Briga, and where he himself died on Sunday, the 16th of May, A.D. 577.