The term "Irish Nobility" refers to the social class of landowners and aristocrats in Ireland, particularly before the 17th century. This group included various titles such as lords, earls, and dukes, who held significant power and influence over their territories. Many noble families, like the O'Neills and Butlers, played crucial roles in Irish history, often engaging in conflicts with the English crown. With the English conquest of Ireland, the structure of the Irish nobility changed significantly. Many native Irish nobles lost their lands and titles, while new titles were granted to English settlers. This led to a complex social hierarchy, blending both native and English influences, which shaped Ireland's political landscape for centuries.