As the controversy surrounding Martin Luther’s Ninety-Five Theses intensified, the University of Wittenberg professor’s prince, Frederick III, Elector of Saxony, arranged for him to be interviewed by Cardinal Cajetan at Augsburg during the meeting of the imperial diet there in October 1518. During the meeting the professor and the cardinal discussed indulgences, the treasury of merit, papal authority, the relationship between Scripture and ministry as well as the necessity of faith for the saving reception of the sacraments.