List of bishops of Llandaff

Bishop of Llandaff
Bishopric
anglican
Incumbent: June Osborne
Province	Wales
Diocese	Llandaff
Cathedral	Llandaff Cathedral

The Bishop of Llandaff is the ordinary of the Church in Wales Diocese of Llandaff.

The diocese covers most of the County of Glamorgan. The Bishop's seat is located in the Cathedral Church of Saint Peter and Saint Paul (the site of a church wrongly said to have been founded in 560 by Saint Teilo), in the village of Llandaff, just north-west of the City of Cardiff. The Bishop's residence is Llys Esgob, The Cathedral Green, Llandaff, in Cardiff.

The controversial Iolo Manuscripts claim an older foundation dating to Saints Dyfan and Fagan, said elsewhere to have missionized the court of King Lucius of Britain on behalf of Pope Eleutherius around AD 166. The manuscripts—others of which are original and others now known forgeries—list Dyfan as the first bishop and, following his martyrdom, Fagan as his successor.Baring-Gould refers to them as chorepiscopi. The present-day St Fagans (referenced in the manuscripts as "Llanffagan Fawr") is now a village near Cardiff.

Originally Celtic Christians, the bishops were in full communion with the Roman Catholic Church from 777 until the Reformation. There is only evidence for the bishops being called Bishop of Llandaff from the early 11th century. Before this, though still ministering to Glamorgan and Gwent, the bishops described themselves as Bishop of Teilo and were almost certainly based at Llandeilo Abbey. The very early bishops were probably based in Ergyng. Before 1107, the title Bishop of Gwlad Morgan (Glamorgan) had been adopted. It was not until the title Bishop of Llandaff was used by Bishop Urban from c. 1119. In medieval records, the bishop was sometimes referred to as the Archbishop of Llandaff. This appears to have been a simple reaction to the claim of St David's to the archiepiscopal title.

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