The List of Church of Ireland dioceses reference article from the English Wikipedia on 24-Apr-2004
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List of Church of Ireland dioceses

Helping orphans the way you would do it
The Church of Ireland's diocesan system is based on the 900-year-old system set up by the Synod of Rathbreasail. However in recent years, declining membership has led to consolidation into two provinces, and the mergers of some dioceses, especially in the south and west of the Island.

List of Dioceses

Compare: List of the Roman Catholic dioceses of Ireland