Defender of the Faith (Latin: Fidei Defensor) is a title belonging to the leader of the Church of England. It was originally conferred upon King Henry VIII of England by Pope Leo X on 11 October 1521 as a reward for the king having written a pamphlet in defense of the sacraments against Martin Luther ("Declaration of the Seven Sacraments Against Martin Luther"). King James V of Scotland received a similar title from Pope Paul III. 