Grangewilliam is also known as Donaghmore (Domhnach Mór), is a monastic settlement about 1mile(2 km) outside Maynooth, Co Kildare.The Monastery stood here until the about the 11th century. There is the remains of the walls and gable left of the 14th-century church built on the site and a small graveyard. It is surrounded by the Carton Demense.It is famous since in 1902 ago an Ogam stone, was found there by Lord Walter Fitzgerald, the son of the Charles FitzGerald of Carton House, the fourth Duke of Leinster.