The monastery at Kilree was supposedly founded in the 6th century by Saint
Rhuidche, from which the name
Cell-righ derives.
Niall Caille,
High King of Ireland, is locally believed to have drowned in the
Kings River at
Callan in AD 846 and his body washed up near
Kells, County Kilkenny. However the Annals of the Four Masters and Annals of Inishfallen are clear the king drowned in the river Callan near Armagh. Some local histories claim he was buried under the
high cross at Kilree, others that he was buried outside the church grounds there because he was a pagan. The Annals however record he was heavily involved in a power struggle between two dominant monastic traditions - that of Patrick versus Brigit, with Niall favouring the latter, so the tale of his
paganism is not credible. He was primarily the king of Ailech, which was in western
County Londonderry, again making it unlikely he is connected with Kilree. The site came into the possession of
Kells Priory by 1340. It was surrendered to
Henry VIII in 1539, and he granted the abbot a life pension. ==Buildings==