sentences:  At least one of these is attributed to the Viking chief Turgesius, who is said to have conquered Dublin.Turgesius built them on high ground overlooking Lough Lene for defensive purposes and dwelled there before being killed by Máel Sechnaill mac Maíl Ruanaid, the High King of Ireland.In addition to this fort, Turgesius also had another upon the largest island of Lough Lene which still today bears his name, Turgesius Island.