10. Henry VIII was the first English monarch to be addressed as "Your Majesty". Prior to this, what was the correct form of address?
From Quiz How to Address Your Peers
Answer:
Your Grace
Henry VIII decided that the form of address for the reigning sovereign should become "Your Majesty" after it had been adopted by the Holy Roman Emperor in 1519. The style had formerly been used to refer to God. However, although it became the most commonly used form of address in England, it was not exclusively used. "Your Highness" and "Your Grace" were both used in official documents after the new style was adopted. It wasn't until the reign of James I that "Majesty" became the exclusive style.
Henry was keen on creating new adopted styles: at the commencement of his reign the style of the sovereign was "By the Grace of God, King of England and France and Lord of Ireland"; by his death, through several changes, his precise style had become, "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, under Jesus Christ, Supreme Head".
Your Grace was still used as the only form of address of the Kings and Queens of Scotland up until the Act of Union in 1707 when the royal houses of England and Scotland were merged. After the Act of Union the full official style of office of the sovereign combined the two styles and became "His/Her Most Gracious Majesty".