The earliest iron artefact in Wales is a sword dating to about 600 BC, but by 400 BC iron was being smelted and crafted into tools all over the British Isles. The story and history of the Druids and the battles with the Romans is all related to the Celts.
These were the Celts, whose cultural influence cannot be overstated. Traditional history has viewed the Celts as fierce conquerors who swept away the vestiges of earlier cultures and took complete control of Welsh society.
A more balanced and likely theory is that the actual number of Celtic newcomers was low, and though they managed to dominate the culture of the earlier inhabitants of Wales, they did so without changing the overall physical or racial characteristics. The Welsh of today are more likely to owe their physiognomy, if not their culture, to the Beaker People rather than the later Celts.
The Celtic nations are territories in western Europe where Celtic languages or cultural traits have survived. The term "nation" is used in its original sense to mean a people who share a common identity and culture and are identified with a traditional territory.
The six territories widely considered Celtic nations are Brittany (Breizh), Cornwall (Kernow), Wales (Cymru), Scotland (Alba), Ireland (Éire) and the Isle of Man (Mannin or Ellan Vannin). These together are commonly referred to as the "Celtic fringe". In each of the six nations, a Celtic language is spoken to some extent
Snowdonia