The question of whether Ireland had been conquered by England has received some attention from historians of eighteenth-century Ireland, mainly because it preoccupied William Molyneux, author of the influential The Case of Ireland . . . Stated (1698). Molyneux defended Irish parliamentary rights by denying the reality of a medieval conquest of Ireland by English monarchs, but he did allow for what could be called ‘aristocratic conquest’. The seventeenth century, too, had left a legacy of conquest, and this paper examines evidence of consciousness among Irish Protestants of descent from ancestral conquerors. It considers how and why this consciousness took a more pronounced sectarian turn during the 1790s. Williamite anniversaries, ...