Prior to the Roman occupation, the dominant religion in Wales was pagan, led by the druids. Little is known about the traditions and ceremonies, but it was known that they performed human sacrifice as described by Tacitus in AD 61, an altar on Anglesey was found to be "drenched with the blood of their prisoners". Christianity was introduced to Wales through the Romans, and after they abandoned the British Isles, it survived in South East Wales at Hentland. It the 6th century, it was home to Dubricius, the first celtic saint.
Christianity, 72% including The Presbyterian Church of Wales, The Church in Wales, Roman Catholic Church makes up the next largest denomination at 3% of the population. Non-Christian religions are small in Wales, making up approximately 1.5% including Islam. Buddhists, and Judaism as well. 18% of people declare no religion.