Pope Pius V Excommunicates Queen Elizabeth I
During the ongoing religious upheavals of the Protestant Reformation, England under Elizabeth I had broken from Rome and established the Church of England as the state religion. Tensions escalated as the pope viewed her Protestant policies and refusal to acknowledge papal authority as heretical threats to Catholic Europe. On February 25, 1570, Pope Pius V issued the papal bull Regnans in Excelsis, formally excommunicating Elizabeth and declaring her deposed while releasing her subjects from any oath of allegiance. The document accused her of heresy and usurpation of ecclesiastical power. English Catholics largely remained loyal to the queen rather than risk treason charges, and the bull ultimately strengthened her domestic position.
Why it matters: The excommunication intensified the divide between Protestant England and Catholic powers, contributing to later conflicts like the Spanish Armada. It underscored the limits of papal political influence in the emerging nation-state system and reinforced Elizabeth's image as a defender of English sovereignty.