When the Church in England broke communion with the Roman Catholic Church, the Church of England was established by the state as the established church. Later, by decree of the Irish Parliament, a similar new body became the State Church in the Kingdom of Ireland. It assumed possession of most Church property. The substantial majority of the population remained faithful to the Latin Rite of Roman Catholicism, despite the political and economic advantages of membership in the state church. They were obliged to find alternative premises and to conduct their services in secret. The English-speaking minority mostly adhered to the Church of Ireland or, especially in Ulster, to Presbyterianism. In 1833, the two provinces of Dublin and Cashel were merged. Over the centuries, numerous dioceses were merged, in view of declining membership. The same is true for this diocese where it can be seen that each of the entities listed in the title would have been a diocese in its own right. It is for this reason that the united diocese has six cathedrals.
Previous entities
The bishoprics of Ferns and Leighlin were united in 1597. Over 238 years, there were twenty-nine bishops of that united diocese. Under the Church Temporalities Act 1833, the united bishopric of Ferns and Leighlin merged with the bishopric of Ossory to form the United Dioceses of Ossory, Ferns and Leighlin on 12 July 1835. Over the next 142 years, there were twelve bishops of that united diocese. Under the same Act, the Archdiocese of Cashel and Emly merged with the United Dioceses of Waterford and Lismore from 14 August 1833. The resultant union was styled the "United Dioceses of Cashel and Waterford". In 1977, the see of "Ossory, Ferns and Leighlin" merged with the neighbouring see of the United Dioceses of Cashel and Waterford. The resultant union was styled the "United Dioceses of Cashel and Ossory"; it is this entity which continues in existence today. At a specially convened Synod of the UnitedDiocese of Cashel and Ossory and the Diocese of Ferns held on Saturday 25 May 2013, it was decided that the Diocese of Ferns, which had operated as an autonomous entity with its own Diocesan Council and Synod, would be fully merged with the Diocese of Cashel and Ossory to constitute the United Diocese of Cashel, Ferns and Ossory. This change came into effect on the occasion of the Diocesan Synod held at Enniscorthy, Co. Wexford on Wednesday 23 October 2013. The Ossory Clerical Society/Association was an evangelical organisation founded by Church of Ireland Clergy in Ossory in 1800.
