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 The Oath of Supremacy was originally imposed by King Henry VIII of England through the Act of Supremacy 1534, but repealed by his daughter, Queen Mary I of England and reinstated under Mary's half-sister, Queen Elizabeth I of England under the Act of Supremacy 1559.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
Henry VIII of England meeting attended by the Gaelic Irish chieftains as well as the Anglo-Irish aristocrats. The style "Henry the Eighth, by the Grace of God, King of England, France and Ireland, Defender of the Faith and of the Church of England and also of Ireland in Earth Supreme Head" remained in use until the end of Henry's reign. Henry VIII of England Henry VIII (28 June 1491 – 28 January 1547) was King of England from 1509 until his death. Henry was the second Tudor monarch, succeeding his father, Henry VII. Henry is best known for his six marriages, in particular his