Anti-Catholicism in the United Kingdom has its origins in the English and Irish Reformations under King Henry VIII and the Scottish Reformation led by John Knox. Within England the Act of Supremacy 1534 declared the English crown to be "the only supreme head on earth of the Church in England" in place of the pope. Any act of allegiance to the latter was considered treasonous because the papacy claimed both spiritual and political power over its followers. Ireland was brought under direct English control starting in 1536 during the Tudor conquest of Ireland. The Scottish Reformation in 1560 abolished Catholic ecclesiastical structures and rendered Catholic practice illegal in Scotland. Today, anti-Catholicism remains common in the United Kingdom, with particular relevance in Scotland and No