Christianity
The religious culture of Wales was overwhelmingly Christian in the early Middle Ages. Pastoral care of the laity was necessarily rural in Wales, as it was in other Celtic regions. In Wales the clergy consisted of monks, orders and non-monastic clergy, all appearing in different periods and in different contexts. There were three major orders consisting of bishops (episcopi), priests (presbyteri) and deacons, as well as several minor ones. Bishops had some temporal authority, but not necessarily in the sense of a full diocese.
Read more about this topic: Wales In The Early Middle Ages