This strong fort of Eliogarty, originally named Durlas Eile and Thurles in English situates across the river Suir. Just like in the case of Nenagh and Clonmel, this fort also was developed by the Norman butlers. Ruins of two of their stronghold towns survive to the day. These are the 15th century tower house guarding the bridge and, the one-time home of Lady Thurles, mother of James Butler, 1st Duke of Ormond, which is seen at the other end of the square and hidden behind shops. Two churches, two convents, two seminaries, and a presbytery also exist in this fort. Archbishops of the diocese have spent their days here more rather than at Cashel town - the traditional office of the bishop - since 1723