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 The Oath of Supremacy was originally imposed by King Henry VIII of England through the Act of Supremacy 1534, but repealed by his daughter, Queen Mary I of England and reinstated under Mary's half-sister, Queen Elizabeth I of England under the Act of Supremacy 1559.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 Executive Council of the Commonwealth of Pennsylvania 1789 and a new state constitution was adopted the following year. The 1790 Constitution did away with the Supreme Executive Council and vested supreme executive power in the office of governor. On December 21, 1790 Thomas Mifflin, the last "President" of Pennsylvania, took office as the state's first governor. (The title of "governor" had been used during the Colonial era, although it referred to the appointed representative of the monarch or the Proprietor, rather than to an elected official.) The executive branch of the state government has been headed by a governor since that time. The 1790 Constitution made no