The man who founded the abbey and the Normans
Diarmait Mac Murchada, King of Leinster, founded Baltinglass Abbey for the Cistercians in 1148, shortly after the order established its first Irish house at Mellifont. Church reformers of the time regarded Diarmait as an ally - he built abbeys, he supported the reform movement. In 1166, a coalition of Irish kings expelled him from Leinster after a long-running dispute over his abduction of Dervorgilla, wife of Tiernan O'Rourke of Breifne. Diarmait crossed to Bristol and appealed to Henry II of England for military help. The Anglo-Norman mercenaries who landed in Ireland in 1169 at his invitation changed the country for the following eight hundred years. The ruins of the abbey he built before any of that stand on the north side of Baltinglass, freely accessible, without a visitor centre or an entry fee.