The
Diocese of Killaloe was one of the twenty-four dioceses established at the
Synod of Rathbreasail in 1111. The boundaries of the diocese consisted of almost all of
County Clare, the northern part of
County Tipperary and the western part of
County Offaly. Its Irish name is
Cill-da-lua (Church of Lua), so named from
St Mo Lua, an abbot who lived in the late 6th century. At the
Synod of Kells in March 1152, Killaloe some lost territory when the dioceses of
Kilfenora,
Roscrea and
Scattery Island were created. Following the
Reformation, there are now parallel Killaloe dioceses: one of the
Church of Ireland and the other of the Roman
Catholic Church. ; In Church of Ireland The pre-Reformation
Cathedral Church of St Flannan, Killaloe continued as the Church of Ireland bishop's seat (
cathedra). The Church of Ireland title was united with
Kilfenora in 1752, and again with
Clonfert & Kilmacduagh in 1834. Since 1976, it has been part of the united bishopric of
Limerick and Killaloe. ; In the Roman Catholic Church The Roman Catholic bishop's seat is located at
St Peter and St Paul Cathedral in
Ennis,
County Clare. The current bishop of the
Roman Catholic Diocese of Killaloe is the Most Reverend
Fintan Monahan who succeeded on 25 September 2016. ==Pre-Reformation bishops==