 Clondalkin witnessed another historic event during the Norman invasion in 1171 when there was a battle there between Richard de Clare (Strongbow) and the last High King of Ireland Ruairi O Conchúir.Clondalkin is a civil parish in the ancient barony of Uppercross.An exclave of the parish, consisting of the single townland of Blundelstown, is located in the neighbouring barony of Newcastle to the west.