The Pope granted the Latin title Fidei defensor to Henry after he published a book in which he defended Catholic doctrine against the criticisms levelled at it by Martin Luther in his Ninety-five Theses during the early stages of the Protestant Reformation.

On the 11th October 1521, Pope Leo X granted the title “Defender of the Faith” to King Henry VIII of England.

On the 5th November 1605, the Gunpowder Plot was foiled when Guy or Guido Fawkes was discovered guarding 36 barrels of gunpowder that had been placed in an undercroft below the House of Lords in London.