The History of Christianity. Lecture 27 of 30. Martin Luther.

L27. By refusing to verify the efficacy of indulgences, Martin Luther earned both the ire and admiration of influential churchmen and statesmen.

He began to question other Church practices: clerical celibacy, Papal infallibility, the sacraments, the merits of the saints. The Reformation had started. Others went further in their reform of Roman Christianity and the Reformation turned violent.