His monastery on a promontory pushing out to the western sea was well placed to be a major centre of 'Celtic' Christianity; indeed, in language, it may well have been more Irish than it was Welsh.

In the 500 years after the fall of the Roman Empire, the Christianity of Wales had its own marked characteristics. It shared them with the other Celtic-speaking countries: Ireland, Cornwall ...

Others have intricate carvings which have become characteristic of the Celtic identity ... even if they had become Christian. Later, there is evidence that Welsh and English Christians did ...

Even in southern Scotland, most of the Brythonic or Welsh kingdoms came under English ... in Britain in the second half of the first Christian millennium The English advance pressed particularly ...