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 The Oath of Supremacy was originally imposed by King Henry VIII of England through the Act of Supremacy 1534, but repealed by his daughter, Queen Mary I of England and reinstated under Mary's half-sister, Queen Elizabeth I of England under the Act of Supremacy 1559.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
Supreme Governor of the Church of England conveniently be called together, thought fit to make this Declaration following ... That We are Supreme Governor of the Church of England ... " Article 37 makes this claim to royal supremacy more explicit: "The Queen's Majesty hath the chief power in this Realm of England, and other her Dominions, unto whom the chief Government of all Estates of this Realm, whether they be Ecclesiastical or Civil, in all causes doth appertain, and is not, nor ought to be, subject to any foreign Jurisdiction. ...[W]e give not to our Princes the ministering either of God's Word, or of the Sacraments...but