- Kingdom: Calchvynedd
- Coordinates: 51.42 North, 3.37 West
- OS Reference Grid: ST1168
Llancarfan was the monastery of Cadoc, one-time ruler of the kingdom. As such, it had a great deal of political power as an advisory location.
The religious establishment was already in existence when Cadoc arrived, possibly a leftover from Roman times. Cadoc's education and teaching abilities soon made it one of the most respected places of learning in all of Britain.
- "De Excidio Gildae"