During the Reformation, the bishops changed their allegiance back and forth between the Pope and the Tudors.
4. c. 37), the combined sees Killala and Achonry became part of the archbishopric of Tuam in 1834.
On the death of Archbishop Le Poer Trench in 1839, the Ecclesiastical Province of Tuam lost its metropolitan status and became the united bishopric of Tuam, Killala and Achonry in the Ecclesiastical Province of Armagh.
[3][4] In the Roman Catholic Church, Achonry remains a separate title.
The Roman Catholic bishop's seat (Cathedra) is now located at the Cathedral Church of the Annunciation of the Blessed Virgin Mary and St. Nathy in Ballaghaderreen, County Roscommon.