Kilree is a former Christian monastery and National Monument located in County Kilkenny, Ireland.

[1][2] Kilree is located 2.4 km (11⁄2 mile) south of Kells, County Kilkenny.

[3][4] The monastery at Kilree was supposedly founded in the 6th century by Saint Rhuidche, from which the name Cell-righ derives.

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.