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 The Oath of Supremacy was originally imposed by King Henry VIII of England through the Act of Supremacy 1534, but repealed by his daughter, Queen Mary I of England and reinstated under Mary's half-sister, Queen Elizabeth I of England under the Act of Supremacy 1559.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
History of the Church of England distinct customs and liturgies (such as the Sarum rite), the organizational machinery of the Church of England was in place by the time of the Synod of Hertford in 672 – 673, when the English bishops were first able to act as one body under the leadership of the Archbishop of Canterbury. Henry's Act in Restraint of Appeals (1533) and the Acts of Supremacy (1534) declared that the English crown was "the only Supreme Head in earth of the Church of England, called "Ecclesia Anglicana"," in order "to repress and extirpate all errors, heresies, and other enormities and abuses heretofore