In 1517, Martin Luther wrote his 95 Theses and posted them to the Castle Church door in Wittenberg. What concerns drove him to do this? In this message, R.C. Sproul navigates the controversy surrounding Johann Tetzel and the selling of indulgences. This message is from Dr. Sproul’s 10-part teaching series Luther and the Reformation. Learn more: https://www.ligonier.org/learn/series/luther-and-the-reformation