The Iron Age & The Celts

500 BC - 400 AD — The Celtic culture emerged, bringing the Gaelic language, Brehon laws, and a rich oral tradition of myths and legends.

The Iron Age in Ireland is synonymous with the Celts. Whether through invasion or cultural diffusion, the La Tène style of art and the Gaelic language took root. This era laid the foundations of Irish culture as we know it today.

Ireland was divided into petty kingdoms (tuatha), each ruled by a king (rí). Society was governed by the Brehon Laws, a complex legal system that covered everything from property rights to bee-keeping. It was a heroic society, obsessed with honor, lineage, and cattle—the primary unit of currency.

This is the age of the great royal sites: Tara (the seat of the High Kings), Emain Macha (Ulster), and Rathcroghan (Connacht). It is also the setting for the great epic cycles of Irish mythology, such as the Ulster Cycle, featuring Cú Chulainn and the cattle raid of Cooley.