Diocese of Llandaff Dioecesis Landavensis Esgobaeth Llandaf
Location
Ecclesiastical province	Wales
Archdeaconries	Llandaff, Margam
Information
Cathedral	The Cathedral Church of Ss. Peter & Paul with Dyfrig, Teilo & Euddogwy, Llandaff
Language	English,Welsh
Current leadership
Bishop	Mary Stallard,Bishop of Llandaff
Archdeacons	Rhod Green,Archdeacon of Llandaff Mark Preece,Archdeacon of Margam
Map
Map of the dioceses in theChurch in Wales
Website
llandaff.churchinwales.org.uk/en/

TheDiocese of Llandaff is an Anglican (Church in Wales)diocese that traces its roots to pre-Reformation times as heir of a Catholic bishopric. It is headed by theBishop of Llandaff, whose seat is located at theCathedral Church of Saint Peter and Saint Paul inLlandaff, a suburb ofCardiff. It currently covers most of the former Welsh county ofGlamorgan, but once stretched from theRiver Towy to the middle of theWye Valley.

The diocese of Llandaff is currently divided into two archdeaconries: Llandaff and Margam.^[1] From 2002–2020 there was a third archdeaconry, that of Morgannwg; in 2020, of its four deaneries, Pontypridd and Merthyr Tydfil & Caerphilly moved to Llandaff, and Cynon Valley and Rhondda moved to Margam. The churches in the former Deanery of Penarth & Barry moved from the archdeaconry of Llandaff to the archdeaconry of Margam in 2023.

Archdeacons of Llandaff

SeeArchdeacon of Llandaff

Archdeacons of Margam

SeeArchdeacon of Margam

Archdeacons of Morgannwg

• 2002–2004 (ret.):Martin Williams
• 2004–2006 (res.):David Yeoman
• 2006–2020:Chris Smith

A number of traditions associate Llandaff withLucius of Britain. Lucius was believed to be a 2nd century king who first beseeched the Pope (Eleutherius) to convert him to Christianity. The Pope's response was to send a Christian mission to Britain, which would include the building of Britain's first church. TheWelsh Triads relate this tradition to Llandaff, stating that Lucius "made the first Church at Llandaf, which was the first in the Isle of Britain." another triad lists "the three archbishoprics of the Isle of Britain" and states that "the first was Llandaf, of the gift of Lleirwg (Lucius), the son of Coel, the son of Cyllin, who first gave lands and civil privileges to such as first embraced the faith in Christ." Although the Lucius legend is now considered to be pseudohistory, it was recounted byNennius,Bede andGeoffrey of Monmouth, and seems to have been widely accepted in the medieval period.^[2]

Four names are associated with the task of executing the Pope's wishes, these include the early Welsh saintsFagan,Deruvian andElvan. Fagan is sometimes named as "the first Bishop of Llandaff" while all three became patrons of churches and villages throughout the diocese.Iolo Morgannwg also linked these early figures to Llandaff, writing extensively on this supposed early foundation. In theIolo Manuscripts, he credits Fagan as the second Bishop of Llandaff (succeeding Dyfan, a figure Iolo conflates with Deruvian).^{[3][4][5][6][a]}

The diocese was reputedly founded in 560 or earlier by SaintTeilo, during the monastic movement initiated by SaintDubricius who presided over several monasteries inErgyng, includingHentland andMoccas. Dubricius is said to have made Teilo abbot of this daughter monastery atLlandaff, which after Dubricius' death became a monastic cathedral and the chief monastery inSouth Wales. Saint Dubricius is usually given as the first bishop.

The early history of diocese is, however, highly controversial, because the chief authority, the diocesan charters in theBook of Llandaff, though dating from the late 6th century, were considerably doctored to raise Llandaff's profile when they were copied in the early 12th century. Similarly, the saints' 'lives' therein have little basis in fact.Gilbert Hunter Doble and others have clearly demonstrated that there is no evidence that Saints Dubricius and Teilo had anything to do with Llandaff. Dubricius was only active inErgyng andGwent, while Teilo's associations with Llandaff have been transferred from his great abbey atLlandeilo Fawr.^{[citation needed]}

The originalchurch at Llandaff (perhaps amonastery) may well have been an early foundation. However, it is likely to have been founded by SaintOudoceus rather than Saint Teilo. The early episcopal authority in the area was, indeed, in Ergyng and Gwent, originally under Dubricius and then his disciples. Their base may have been atWelsh Bicknor,Kenderchurch orGlasbury. Teilo's foundation at Llandeilo may have superseded Ergyng in the mid-7th century or, as David Nash Ford suggests, the two may have remained the seats of independent, yet parallel, bishoprics, as late as the mid-9th century. Both had accepted the ways of theRoman Catholic Church in 777.

There certainly seems to have only been a single diocese by the late 9th century, based at Llandeilo. The Bishops were known as 'Bishop of Teilo'. When exactly the bishop'scathedra (and the Teilo traditions) moved to Llandaff, however, is not clear. Ford, again, suggests a date not much later, after the death of BishopNobis in 874. However, a date in the early 11th century or even later cannot be ruled out. The bishops of Llandaff long maintained absolute independence within their own territories, and the rights and privileges of the Church of Llandaff were extensive. However, there is a tradition that by 872, the bishops had already, nominally at least, accepted the authority of theEnglishProvince of Canterbury. Certainly this was the case by 982. The firstSaxon bishop, Wulfrith, had been installed in 930, though he may have been of dual-nationality.

After theNorman Conquest of south-east Wales in the 1090s, thearchbishops of Canterbury began to exercise their jurisdiction over Wales, and SaintAnselm placed BishopHerewald of Llandaff under interdict. Herewald's successor,Urban, was consecrated at Canterbury, after taking an oath of canonical obedience to the archbishop, and from that time Llandaff became a full dependent of Canterbury. Standing difficulties were the admixture of race and language due to the English settlements and the ignorance and incontinence of the Welsh clergy, who had ceased to observe celibacy and gave scandal to theNormans andEnglish alike. A reform was gradually effected, chiefly by the establishment of new monasteries andmendicant houses. TheBook of Llandaff, now at theNational Library of Wales,Aberystwyth, reflects Urban's territorial ambitions for his diocese. The present cathedral dates substantially from his time, 1120 and later.

In the religious turmoil of the 16th century, the Bishop of Llandaff,Anthony Kitchin, was the only bishop in office at the accession ofElizabeth I who acquiesced in the religious changes and was accounted an apostate by fellow Catholics. He died in 1563. Rome had already decided to suppress the Catholic see in 1530;

Thereafter, there continued a line of Anglican bishops up to the present day. Some of these showed aptitude for the conditions of the post, e. g. Blethyn and Morgan (the translator of the Bible), also those appointed under Charles II. Another Morgan suffered many years imprisonment for his Laudian convictions. The administration of the diocese suffered from its poor endowment and limited patronage, leading at the end of the 18th century to non-resident bishops (e.g. Watson) and theholding with other ecclesiastical benefices (such as theDeanery of St. Paul's). Failure to speak Welsh characterised the bishops during this period. Bishop Ollivant notably took up the challenge of providing churches for the newly industrialised valleys. The population explosion created pressure for the division of the diocese, which was put into effect with Disestablishment. The diocese remained part of theProvince of Canterbury until the creation of theChurch in Wales on 31 March 1920.

APC = ancient parish church; MC = medieval chapel.

This was formed from theEglwysilan &Caerphilly Rectorial Benefice.^[8] It has an estimated population of 40,722.^[9] As of October 2024 it was served by one Ministry Area Leader and one Team Vicar.^[10]

¹original dedication to St Peter

This was formed by the union of the parishes ofGabalfa andTremorfa.^[15] It has an estimated population of 19,978.^[16] As of October 2024 it was served by one Vicar and one Curate.^[17]

This was formed by the union of the parishes of Capel Llanillterne,Michaelston-Super-Ely,Pentyrch,Radyr,St Fagans andTongwynlais.^{[18][19][20][21]} It is named after. It has an estimated population of 33,024.^[22] As of October 2024 it was served by one Ministry Area Leader and two Vicars.^[23]

¹original dedication to St James

This was formed by the union of the parishes ofGilfach Goch,Tonyrefail and theLlantrisant Rectorial Benefice.^[27][28] It is named after. It has an estimated population of 67,922.^[29] As of October 2024 it was served by three Vicars.^[30]

This was formed by the union of the parishes ofAbercanaid,Dowlais,Merthyr Tydfil,Merthyr Vale,Penydarren andTroedyrhiw.^{[33][34][35][36]} It is named after. It has an estimated population of 46,882.^[37] As of October 2024 it was served by one Ministry Area Leader and three Vicars.^[38]

¹originally dedicated to St Mary^[42]

This was formed by the union of the parishes ofCardiff Roath Park,Lisvane andLlanishen.^[43][44][45] It is named after. It has an estimated population of 35,470.^[46] As of October 2024 it was served by one Ministry Area Leader and two Vicars.^[47]

¹originally known as Christ Church Llanishen

This was formed from the benefice ofPontypridd,^[48] previously including the parish ofPwllgwaun and Llanddewi Rhondda. It has an estimated population of 39,148.^[49] As of October 2024 it was served by one Ministry Area Leader and one Vicar.^[50]

¹since 2022 administered from Citizen Church in Cardiff rather than as part of the local Ministry Area

This was formed by the union of the parishes ofCardiff Citizen Church, Cardiff Dewi Sant,Cathays,Roath St Edward, Roath St German, Roath St Margaret, Roath St Martin and Urban Crofters.^{[61][62][63][64][65][66][67]} It is named after. It has an estimated population of 57,697.^[68] As of October 2024 it was served by one Ministry Area Leader, five Vicars and one Curate.^[17][69]

¹originally dedicated to St Teilo. Also runs churches in Pontypridd (St Mary's Glyntaff) and Caerphilly (Senghenydd)²closed 2015 and reopened 2019 as Urban Crofters³originally dedicated to St Andrew; closed in 1954. Congregation of Eglwys Dewi Sant (founded 1891; see below) moved in, and church reconsecrated as Dewi Sant 1956.

This was formed from the Cardiff City Parish.^[70] It is named after. It has an estimated population of 6,847.^[71] As of October 2024 it was served by one Priest-in-Charge, one Assistant Curate and one Associate Priest.^[72]

¹dedicated to St Elvan until 1903

This was formed by the union of the parishes of Cardiff St Dyfrig & St Samson, Cardiff St Mary,Grangetown and Roath St Saviour.^[77][78][79] It is named after. It has an estimated population of 47,003.^[80] As of October 2024 it was served by one Ministry Area Leader.^[81]

¹original dedication to St Samson

This was formed by the union of the parishes ofBargoed,Bedlinog,Brithdir,Deri,Fochriw,Gelligaer,Llanbradach,Llanfabon,Pontlottyn,Treharris,Trelewis andYstrad Mynach.^{[84][85][86][87][88]} It is named after theTaff Valley and theRhymney Valley. It has an estimated population of 52,387.^[89] As of October 2024 it was served by one Ministry Area Leader, two Vicars and one Curate.^[90]

¹original dedication to St Andrew

This was formed from theWhitchurch Rectorial Benefice.^[99] It is named after. It has an estimated population of 34,750.^[100] As of October 2024 it was served by one Ministry Area Leader and three Vicars.^[101]

This was formed from the Cathedral Parish ofLlandaff.^[102][103] It has an estimated population of 6,228.^[104] As of October 2024 it was served by one Dean, one Canon Precentor and one Canon Chancellor.^[105]

¹original dedication to SS Dyfrig & Teilo

This was formed by the union of the parishes ofCaerau,Ely,Fairwater, Glan Ely and theCanton Rectorial Benefice.^{[106][107][108][109]} It has an estimated population of 64,800.^[110] As of October 2024 it was served by one Ministry Area Leader and four Vicars.^[111]

This was formed by the union of the parishes of LlansawelBriton Ferry,Skewen and theNeath Rectorial Benefice.^{[113][114][115]} It is named after. It has an estimated population of 39,559.^[116] As of October 2024 it was served by one Ministry Area Leader and one Vicar.^[117]

¹original dedication to St Thomas a Becket²known as the Tonmawr Mission until 2003

This was formed from the Rectorial Benefice ofBarry,^[124] including the former parishes ofMerthyr Dyfan andCadoxton-juxta-Barry. It has an estimated population of 54,821.^[125] As of October 2024 it was served by one Ministry Area Leader and two Vicars.^[126]

¹original dedication to St Teilo

This was formed in 2022 by the union of the parishes ofCadoxton-Juxta-Neath,Cilybebyll,Dulais Valley,Dyffryn,Tonna andVale of Neath.^{[129][130][131][132][133]} Its name means "A new safe haven" in Welsh.^[134] It has an estimated population of 34,303.^[135] As of October 2024 it was served by three Vicars.^[136]

This was formed by the union of the parishes ofColwinston,Llandow,Llysworney and theCowbridge Rectorial Benefice.^[138][139] It is named after the town of Cowbridge. It has an estimated population of 8,700.^[140] As of October 2024 it was served by one Ministry Area Leader and two Vicars.^[141]

This was formed by the union of the parishes ofAberdare St Elvan, Aberdare St Fagan, Aberdare St John the Baptist, Aberdare St John the Evangelist andHirwaun.^{[142][143][144]} It is named after the upperCynon Valley. It has an estimated population of 26,220.^[145] As of October 2024 it was served by one Ministry Area Leader and one Vicar.^[146]

This was formed by the union of the parishes ofAberaman,Abercynon,Cwmaman,Cwmbach, Matthewstown,Miskin,Mountain Ash,Penrhiwceiber andYnysboeth.^{[149][150][151][152][153]} It is named after theCynon Valley. It has an estimated population of 34,284.^[154] As of October 2024 it was served by one Ministry Area Leader and two Vicars.^[155]

This was formed by the union of the parishes ofMichaelston-Le-Pit,Penmark,Porthkerry,Rhoose,St Andrews Major,St Lythans,Sully andWenvoe.^{[160][161][162][163]} Its name means "South Glamorgan" in Welsh. It has an estimated population of 20,975.^[164] As of October 2024 it was served by one Vicar.^[165]

This was formed from the East Vale Rectorial Benefice.^[166] It has an estimated population of 4,213.^[167] As of October 2024 it was served by one Ministry Area Leader and one Vicar.^[168]

This was formed from the Glamorgan Heritage Coast Rectorial Benefice.^[171] It is named after theGlamorgan Heritage Coast. It has an estimated population of 19,949.^[172] As of October 2024 it was served by one Ministry Area Leader and two Vicars.^[173]

This was formed by the union of the parishes ofCaerau,Glyncorrwg,Llangynwyd,Maesteg and Troedrhiwgarth.^{[176][177][178]} It is named after theAfon Llynfi andAfan Valleys. It has an estimated population of 26,664.^[179] As of October 2024 it was served by one Vicar.^[180]

This was formed by the union of the parishes ofKenfig,Kenfig Hill,Margam,NewtonNottage,Porthcawl andPyle.^{[187][188][189][190]} It is named afterMargam Abbey (the town of Margam, confusingly, is in the Port Talbot Ministry Area). It has an estimated population of 34,858.^[191] As of October 2024 it was served by two Vicars.^[192]

¹this church was located in Kenfig and was moved (literally) to Pyle in the 15th century due to encroaching sands

This was formed by the union of the parishes ofAberkenfig,Bettws, Llandyfodwg &Cwm Ogwr,Llangeinor & theGarw Valley,Llanilid,Llansantffraid Aberkenfig andPencoed.^{[194][195][196][197]} Its name means "Four Rivers" in Welsh. It has an estimated population of 38,245.^[198] As of October 2024 it was served by one Ministry Area Leader and four Vicars.^[199]

This was formed by the union of the parishes ofLlandough-juxta-Penarth andPenarth.^[208] It is named after Penarth. It has an estimated population of 26,385.^[209] As of October 2024 it was served by one Ministry Area Leader, one Vicar and one Curate.^[210]

¹occasional services still held

This was formed by the union of the parishes ofCoity,Coychurch,Laleston,Merthyr Mawr,Newcastle, Nolton andPenyfai.^{[214][215][216]} It is named afterBridgend (Pen-y-bont ar Ogwr in Welsh). It has an estimated population of 54,564.^[217] As of October 2024 it was served by one Ministry Area Leader and one Vicar.^[218]

This was formed by the union of the parishes ofAberavon St Mary, Aberavon St Agnes,Baglan,Cwmafan,Margam St David,Port Talbot St Paul, Port Talbot St Theodore andSandfields.^{[220][221][222]} It is named after the town of Port Talbot. It has an estimated population of 44,811.^[223] As of October 2024 it was served by one Ministry Area Leader and two Vicars.^[224]

This was formed by the union of the parishes ofClydach Vale,Dinas, Pen Rhondda Fawr,Penygraig, Pont Rhondda,Porth Newydd, Rhondda Fach Uchaf,Tonypandy,Williamstown andYstradyfodwg.^{[231][232][233][234][235][236][237]} It is named after theRhondda area. It has an estimated population of 70,235.^[238] As of October 2024 it was served by three Vicars.^[239]

¹a joint church of theBaptist Union of Great Britain, theBaptist Union of Wales, theChurch in Wales, theCongregational Federation, theMethodist Church, thePresbyterian Church of Wales, theUnion of Welsh Independents, and theUnited Reformed Church

• Holy Cross:Cowbridge
• (Holy) Trinity: Llandow, Marcross
• St Andrew: St Andrew's Major, St Andrew's Minor
• St Anne:Talygarn
• St Augustine of Hippo: Penarth
• St Baglan: Baglan
• St Bleddian: St Lythans
• St Brewis: Eglwysbrewis
• St Bridget: St Bride's Major, St Bride's Minor, St Bride's-super-Ely
• St Brynach: Llanfrynach
• St Cadoc:Aberpergwm, Cadoxton-juxta-Barry, Cadoxton-juxta-Neath, Gelligaer, Llancarfan, Llanmaes, Pendoylan, Pentyrch
• St Canna: Llangan
• St Ceinwyr: Llangeinor
• St Crallo: Coychurch
• St Curig: Porthkerry
• St Cynwyd: Llangynwyd
• St David: Bettws, Laleston, Nottage
• St Denys: Lisvane
• St Dochdwy: Llandough-juxta-Cowbridge, Llandough-juxta-Penarth
• St Dunwyd: St Donats, Welsh St Donats
• SSDyfrig & Teilo: Llandaff
• St Ellteyrn: Llanilltern
• St George: St George-super-Ely
• St Giles: Gileston
• St Gwynno: Llanwonno
• St Ilan: Eglwysilan
• St Ilar: St Hilary
• SSIlid & Curig: Llanilid
• St Illtud: Llanharry, Llantrithyd, Llantwitfardre, Llantwit-juxta-Neath, Llantwit Major, Newcastle
• SS Illtud,Gwynno &Dyfodwg: Llantrisant
• St Isan: Llanishen
• St James: Kenfig, Leckwith, Wick
• St John the Baptist: Aberdare,Cardiff, Glyncorrwg, Llanblethian, Newton, Radyr, Sully, Ystradyfodwg
• St John the Evangelist: Cilybebyll
• SS Julius & Aaron: Llanharan
• St Lawrence: Lavernock
• St Mabon: Llanfabon
• St Margaret:Crynant, Roath
• St Mary: Aberavon, Bonvilston, Briton Ferry, Caerau, Cardiff, Coity, Margam Abbey, Monknash,Nolton, Penmark, St Fagans, St Mary Church, St Mary Hill, Wenvoe, Whitchurch
• St Mary Magdalene: Maudlam
• St Michael: Colwinston, Cwmavon, Ewenny, Flemingston, Llanmihangel, Michaelston-le-Pit, Michaelston-super-Ely
• St Nicholas: Barry, St Nicholas
• St Owain: Ystradowen
• St Peter: Cogan, Peterston-super-Ely,Peterston-super-Montem
• St Senwyr: Llansannor
• St Tathan: St Athan
• St Teilo: Merthyr Dyfan, Merthyr Mawr
• St Thomas Becket: Neath
• St Tudwg: Tythegston
• St Tydfil: Llysworney, Merthyr Tydfil
• St Tyfodwg: Llandyfodwg
• No dedication/dedication unknown:Llancadle

• All Saints: Barry (1908), Cardiff (1856), Cwmavon (1855), Llanbradach (1896), Llandaff North (1873), Maerdy (1885), Matthewstown (1903), Merthyr Tydfil (C19th), Penarth (1891), Penyfai (1903), Porthcawl (1866), Rhiwbina (1931), Skewen (1905), Southerndown (1876), Trealaw (?), Treherbert (1894)
• Christ Church: Ferndale (1876), Merthyr Tydfil (1853), Pant (1870s), Radyr (1903), Roath Park (1964), Ynysybwl (1887)
• Holy Cross: Port Talbot (1827)
• Holy Nativity: Penarth (1894)
• (Holy) Trinity: Pengam (C19th), Sandfields (1953), Tylorstown (1883), Ystradmynach (1855)
• Resurrection: Glan Ely (1910)
• St Agnes: Aberavon (1902)
• St Aidan: Rhymney Bridge (C19th)
• St Alban: Blackweir (?), Tonyrefail (1930), Treherbert (1891)
• St Andrew: Caerphilly (1960s), Cardiff (1863), Fochriw (1864), Llantwitfardre (?), Tonypandy (1877)
• St Anne: Cefnhengoed (1931), Roath (1872), Tonna (1892), Ynyshir (1886)
• St Baglan: Baglan (1959)
• St Barnabas: Gilfachgoch (1899), Penygraig (1897), Saltmead (1896), Trehafod (?)
• St Baruc: Barry Island (1897)
• St Cadoc: Bedlinog (1873)
• St Catherine: Baglan (1875), Caerphilly (1910), Canton (1885), Neath (1891), Pontypridd (1868)
• St Clement: Briton Ferry (1866)
• St Colman: Cefn Cribwr (1924)
• St Cynfelin: Caerau (1910)
• St Cynon: Llwynypia (?), Treharris (1861)
• St David: Aberdare (1853), Brithdir (?), Cardiff (1891), Cowbridge Road West (1871), Dyffryncellwen (1925), Groesfaen (1892), Hopkinstown (1855), Maesteg (1853), Margam (1959), Merthyr Tydfil (1847), Miskin (1878), Mountain Ash (1886), Neath (1866), Nottage (1948), Ogmore Vale (1879), Pencoed (1877), Pontycymmer (1911), Resolven (1850), Tonpentre (1881), Tonypandy (?), Tonyrefail (1903), Tylorstown (1906)
• St Dunstan: Ferndale (1906)
• St Dunwyd: Carnetown (1898)
• St Dyfan: Clydach (?)
• St Dyfrig: Cardiff (1872)
• St Edward: Roath (1915)
• St Elwen: Aberdare (1852), Adamsdown (1856)
• St Fagan: Trecynon (1853)
• St Faith: Llanishen (1958)
• St Gabriel: Abergwynfi (1894)
• St George: Cwmparc (1896), Tonyrefail (?)
• St German: Roath (1857)
• St Gwladys: Bargoed (1877)
• St Gwynno: Abercynon (1904)
• St Illtyd: Cefn Pennar (1894), Williamstown (1884)
• St James: Blaengarw (1890), Cardiff (C19th), Llwydcoed (1895), Pentrebach (C19th), Taffs Well (1897)
• St John the Baptist: Alltwen (1888), Briton Ferry (1878), Dowlais (1827), Miskin (1909), Neath (1850), Nelson (1887), Ogmore Vale (1900), Troedyrhiw (1851)
• St John the Evangelist: Canton (1855), Cymmer (?), Graig (C19th), Oakwood (1902), Penllyn (1850), Penydarren (1858), Pontrhydyfen (?), Porth (1889), Robertstown (1890), Tondu (1868)
• St Joseph: Cwmaman (1890)
• St Lleurwg: Hirwaun (1858)
• St Luke: Canton (1909), Cilfynydd (1892), Cwmdare (1887), Gellideg (?), Llwynycelyn (1921), Maerdy (?), Penarth (1960), Rhydyfelin (1907)
• St Margaret: Aberaman (1883), Gilfach (1895), Mountain Ash (1862)
• St Mark: Cardiff (1870), Gelli (1896), Pwllgwaun (1892)
• St Martin: Caerphilly (C19th), Roath (1886)
• St Mary: Barry (1905), Blaengwrach (1608), Brackla (1995), Cardiff (1843), Fochriw (1907), Glyntaff (1839), Merthyr Vale (1926), Nantgarw (1845), Penrhys (1992), Pontyrhyl (1892), Seven Sisters (C19th), Skewen (1905), Trecco Bay (1953), Treherbert (1866), Trelewis (1886), Troedrhiwgarth (1891)
• St Mary Magdalene: Cwmbach (1882), Pontygwaith (1896)
• St Matthew: Abernant (1880), Dyffryn (1871), Pontypridd (1885), Treorchy (1871)
• St Matthias: Treharris (1896)
• St Michael: Beddau (1936), Cathays (1922), Maesteg (1898), Tongwynlais (1850)
• St Paul: Barry (1893), Grangetown (1879), Heolycyw (1889), Nantymoel (1909), Pontyclun (1895), Port Talbot (1910), Porth (1890)
• St Peter: Abercwmboi (1918), Brynna (1830s), Deri (1890), Dinaspowys (1881), Fairwater (1937), Goytre (1915), Nantyffyllon (?), Nantymoel (1889), Pentre (1889), Rhoose (1912), Senghenydd (1896)
• SS Peter & Paul: Abercanaid (1884), Neath (1964)
• St Philip: Cardiff (1930)
• St Samson: Grangetown (1907)
• St Saviour: Splott (1884)
• St Stephen: Cardiff (C19th), Ystradrhondda (1896)
• St Teilo: Cathays (1879), Miskin (1890), Tonmawr (2003)
• St Theodore of Tarsus: Bryncethin (1896), Kenfig Hill (1891), Pontycymer (1895), Port Talbot (1897)
• St Thomas: Briton Ferry (1881), Clydach Vale (1896), Coytrahen (C19th), Wattstown (1896), Whitchurch (1911)
• St Timothy: Caerau (1957)
• St Tydfil: Bryn (1890)
• St Tydfil's Well: Merthyr Tydfil (?)
• St Tyfaelog: Pontlottyn (1863)
• St Tyfodwg: Treorchy (1895)
• St Winifred: Penrhiwceiber (1883), Penywaun (1958)
• No dedication/dedication unknown: Dinas (1897), Llanbradach (C19th), Penycoedcae (C19th)

• List of Catholic dioceses in England and Wales

• Clifton, A. B.; Willmott, Edmund Charles Morgan (1907).The cathedral church of Llandaff: a description of the building and a short history of the see, Volume 20. George Bell & Sons.

• Diocese of Llandaff website
• GigaCatholic – Cardiff Metropolitan Archdiocese

Bibliography

• Davies, Wendy. (1982).Wales in the Early Middle Ages.
• Doble, G. H. (1971).Lives of the Welsh Saints

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