Johann Tetzel, OP (1465–11 August 1519) was a Roman Catholic German, Dominican friar and preacher. In addition, he was a Grand Inquisitor of Heresy to Poland, and later became the Grand Commissioner for indulgences in Germany. Tetzel was reputedly known for granting indulgences in exchange for money, which allow a remission of temporal punishment due to sin, the guilt of which has been forgiven, a position heavily challenged by Martin Luther.