Norman Invasion & Gaelic Resurgence

1169 - 1600s — The Anglo-Norman invasion brought castles, feudalism, and new laws. Over centuries, they assimilated, becoming 'more Irish than the Irish themselves'.

In 1169, a group of Anglo-Norman knights landed in Bannow Bay, invited by the deposed King of Leinster, Diarmait Mac Murchada, to help him regain his kingdom. They never left. Led by Strongbow, they seized large swathes of land, introducing feudalism, common law, and the first stone castles to Ireland (such as Trim and Carrickfergus).

However, the Normans failed to conquer the entire island. Over the following centuries, the "Old English" settlers began to adopt Irish customs, language, and dress, becoming "Hiberniores Hibernis ipsis"—more Irish than the Irish themselves.

The English crown tried to halt this assimilation with laws like the Statutes of Kilkenny (1366), which banned the Irish language and intermarriage, but they were largely ignored. The final collapse of the old Gaelic order came only after the Nine Years' War, ending with the Flight of the Earls in 1607, when the last great Gaelic chieftains left Ireland for the continent.