Properly the Metropolitan See of Munster, the Diocese of Cashel and the Diocese of Emly are commonly referred to as the Archdiocese of Cashel and Emly (more). Saint Ailbe is the Patron of the Archdiocese whose feastday is celebrated on 12 September.
The following lists are of the parishes which comprised the Cashel and Diocese of Emly. Parliament ordered the union of Cashel and Emly in 1568, but Catholics did not recognise this.
The union of the Cashel and the Diocese of Emly was formally effected in 1718, sixty-seven years after the last Bishop of Emly, Blessed Terence Albert O’Brien (1647-51), died for the faith on a Limerick scaffold when Cromwellian forces under Henry Ireton captured the city in late October 1651. Since that date, and, indeed, for long centuries before, both dioceses shared a similar historical experience.
Canon Law has no such category as “Archdiocese”, but the name is popularly applied to wherever there is an Archbishop. An bishop appointed to an Ecclesiastical Province (such as Cashel) has the title of Archbishop and is responsible for fostering pastoral action and communication between bishops in the region. Such a bishop is a Metropolitan. Thus the bishop in Cashel and Emly diocese is Metropolitan Archbishop of the Ecclesiastical Province of Munster. A symbol of this appointment, the pallium, is given by the Pope to the office holder. The pallium is a type of wool stole and can be worn within the province. Cashel and Armagh are the original Irish Ecclesiastical Provinces, having first received pallia from Rome as a result of the request initiated by Saint Malachy to Pope Innocent II in 1139. Four povinces with thirty-eight dioceses in total were instituted in the 1152 Synod of Kells.