Diocese of Menevia Dioecesis Menevensis Esgobaeth Mynyw | |
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Coat of arms | |
| Location | |
| Country | Wales |
| Territory | Swansea, Neath Port Talbot, Carmarthenshire, Ceredigion, Pembrokeshire, Brecknock and Radnor |
| Ecclesiastical province | Cardiff |
| Coordinates | 52°00′29″N4°30′18″W / 52.008°N 4.505°W /52.008; -4.505 |
| Statistics | |
| Area | 9,310 km2 (3,590 sq mi) |
Population
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| Parishes | 55 |
| Information | |
| Denomination | Catholic |
| Sui iuris church | Latin Church |
| Rite | Roman Rite |
| Established | 6th century |
| Dissolved | 2024 |
| Cathedral | Swansea Cathedral |
| Secular priests | 30 |
| Leadership | |
| Pope | Leo XIV |
| Bishop | Mark O'Toole |
| Metropolitan Archbishop | Mark O'Toole |
| Vicar General | Joseph Cefai |
| Bishops emeritus | Thomas Matthew Burns |
| Map | |
Diocese of Menevia within the Province of Cardiff | |
| Website | |
| menevia.org | |
TheDiocese of Menevia (Latin:Dioecesis Menevensis) was aLatin Churchdiocese of theCatholic Church in Wales. It was one of twosuffragan dioceses in theecclesiastical province of Cardiff and was subject to theArchdiocese of Cardiff, until it merged with the archdiocese in 2024, to form theRoman Catholic Archdiocese of Cardiff-Menevia.

The history of the diocese of St Davids is traditionally traced tothat saint (Dewi) in the latter half of the 6th century. Records of the history of the diocese beforeNorman times are very fragmentary, however, consisting of a few chance references in old chronicles, such asAnnales Cambriae andBrut y Tywysogion (Rolls Series).
On 12 May 1898, theApostolic Vicariate of Wales was elevated to diocesan status and had its seat at theCathedral Church of Our Lady of Sorrows in Wrexham[1] until 1987 when theDiocese of Wrexham was created.The Diocese of Menevia covered between 1987 and 2024 the area roughly that of the ancientDiocese of St Davids.[2] ("Menevia" was the Roman name forSt Davids.) The Catholic diocese was led byMark O'Toole,Archbishop of Cardiff,[3] when Cardiff and Menevia merged in a single Archdiocese in 2024.
The sixth century bishop St Ismael is honoured on 16 June.[4]
In 2007, there were 27,561 Catholics in the diocese which was served by 34diocesan priests, 19religious priests, 9non-ordained malereligious and 100 female religious. There are 34 Catholic educational institutions in the then-diocese,[8] including three secondary schools:
Founded in 1965, St Joseph's School was the first Catholiccomprehensive school in Wales.[9]
The geographic remit consisted of the City and County ofSwansea,Neath andPort Talbot, and thetraditional counties ofBrecknockshire,Cardiganshire,Carmarthenshire,Pembrokeshire andRadnorshire - an area of 9,310 square kilometres (3,590 sq mi) roughly.
Thecathedra was located atSt Joseph's Cathedral, Swansea. Situated within what was the diocese is the Welsh National Shrine ofOur Lady of Cardigan atCardigan.
There were a total of five deaneries in the Diocese of Menevia, all of which cover several churches in that area, overseen by a dean.
The deaneries are: