THE GERMAN REVOLT. The crisis came over the sale of indulgences for sins by the papal agent, Tetzel, who began the practice in the neighborhood of Wittenberg, where Luther was a Professor of Theology, in 1516. There is little doubt but that Tetzel, in his zeal to raise money for the rebuilding of the church of Saint Peter's at Rome, a great undertaking then under way, exceeded his instructions and made claims as to the nature and efficacy of indulgences which were not warranted by church doctrines. Such would be only human. The sale, however, irritated Luther, and he appealed to the Archbishop of Magdeburg to prohibit it. Failing to obtain any satisfaction, he followed the old university custom, made out ninety- five theses, or reasons, why he did not believe the practice justifiable, detailed the abuses, set forth what he conceived to be the true Christian doctrine in the matter, and challenged all comers to a debate on the theses (R. 151). Following true university custom, also, these theses were made out in Latin, and in October, 1517, Luther followed still another university custom and nailed them to the church door in Wittenberg. Luther was probably as much surprised as any one to find that these were at once translated into German, printed, and in two weeks had been scattered all over Germany. Within a month they were known in all the important centers of the Western Christian world. They had been carried everywhere on the currents of discontent. Luther at first intended no revolt from the Church, but only a protest against its practices. From one step to another, though, he was gradually led into open rebellion, and finally, in 1520, was excommunicated from the Church. He then expressed his defiance by publicly burning the bull of excommunication, together with a volume of the canon law. This was open rebellion, and such heresy (R. 152) must needs be stamped out. Luther took his stand on the authority of the Scriptures, and the battle was now joined between the forces representing the authority of the Church _versus_ the authority of the Bible, and salvation through the Church _versus_ salvation through personal faith and works. [9] Luther also forced the issue for freedom of thought in religious matters. It was, to be sure, some three centuries before freedom in religious thinking and worship became clearly recognized, but what the early university masters and scholars had stood for in intellectual matters, Luther now asserted in religious affairs as well. [Illustration: FIG. 88. SHOWING THE RESULTS OF THE PROTESTANT REVOLTS]