Episcopal see
The Episcopal see was a union of the bishoprics of Ferns and Leighlin which were united in 1597. Over two hundred and thirty-eight years, there were twenty-nine bishops of the united diocese. Under the Church Temporalities (Ireland) Act 1833, Ferns and Leighlin were combined with Ossory to form the united bishopric of Ossory, Ferns and Leighlin on 12 July 1835.