Oath of Supremacy Oath of Supremacy The Oath of Supremacy required any person taking public or church office in England to swear allegiance to the monarch as Supreme Governor of the Church of England. Failure to do so was to be treated as treasonable. The Oath of Supremacy was originally imposed by King Henry VIII of England through the Act of Supremacy 1534, but repealed by his daughter, Queen Mary I of England and reinstated under Mary's half-sister, Queen Elizabeth I of England under the Act of Supremacy 1559. The Oath was later extended to include Members of Parliament and people studying at
Church of England of the 39 Articles defines the church as follows: The British monarch has the constitutional title of Supreme Governor of the Church of England. The canon law of the Church of England states, "We acknowledge that the Queen's most excellent Majesty, acting according to the laws of the realm, is the highest power under God in this kingdom, and has supreme authority over all persons in all causes, as well ecclesiastical as civil." In practice this power is often exercised through Parliament and the Prime Minister. The Church of Ireland and the Church in Wales separated from the Church of