 Fisher has also been named, though without any real proof, as the true author of the royal treatise against Martin Luther entitled ""Assertio septem sacramentorum"" ("Defence of the Seven Sacraments"), published in 1521, which won for King Henry VIII the title ""Fidei Defensor"" ("Defender of the Faith").Prior to this date Fisher had denounced various abuses in the church, urging the need for disciplinary reforms.On about 11 February 1526, at the King's command, he preached a famous sermon against Luther at St Paul's Cross, the open-air pulpit outside St Paul's Cathedral in London.