"Johann Tetzel OP (c. 1465 – 11 August 1519) was a Holy Roman Empire Dominican friar and preacher. He was appointed Inquisitor for Poland and Saxony, later becoming the Grand Commissioner for indulgences in Germany. Tetzel was known for granting indulgences on behalf of the Roman Catholic Church in exchange for money, which are claimed to allow a remission of temporal punishment due to sin, the guilt of which has been forgiven, a position heavily challenged by Martin Luther. This contributed in part to the Reformation. The main usage of the indulgences sold by Johann Tetzel was to help fund and build the St. Peter´s Basilica." - (en.wikipedia.org 11.11.2019)
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