In the early stages of the Iron age period a new culture started to evolve across Europe. This new culture is known as the Celtic Culture and its influence made its way into Ireland.
When Did The Celts Arrive In Ireland?
Before the arrival of Christianity in Ireland, there was no actual written history. It is unclear exactly when the Celtic culture arrived in Ireland. The first sign of any Celtic influences to reach Ireland dates between 800 B.C. and 400 B.C. but this is often debated.
Did The Celts Invade Ireland?
There is a general belief the Celts invaded Ireland just like the Vikings or Normans did in the Medieval Period in Ireland. However, there is no direct evidence to support a large invasion as they arrived in various stages and their migration was a lengthy process. It was likely, the influence of the Celts arrived in Ireland from Travel and Trade with places such as Britain and Europe. Over time the spread of Celtic language, artwork, Iron work, etc… would finally find its way into Ireland.