This occasion was provided by the preaching in Germany of an Indulgence proclaimed by Leo X. (1513-21). The building of St. Peter's had been begun by Julius II. and was continued by his successor Leo X., the son of Lorenzo de' Medici, and the great patron of the Humanist movement. In order to provide funds to enable him to continue this gigantic undertaking Leo X. proclaimed an Indulgence. In addition to Confession and Holy Communion it was ordered that those of the faithful who wished to share in the spiritual favours granted by the Pope should contribute according to their means for the completion of St. Peter's, or that they should pray for the success of the work in case poverty did not permit them to give alms. The publication of the Indulgence in a great part of Germany was entrusted to Albrecht of Brandenberg, who had been elected Archbishop of Mainz though he was already Archbishop of Magdeburg and Administrator of Halberstadt. The fees to be paid by an archbishop appointed to Mainz were exceptionally high not to speak of the large sum required for the extraordinary favour of being allowed to hold two archbishoprics. As a means of enabling Albrecht to raise the required amount, it was proposed by an official of the Datary that he should be allowed to retain half of the contributions given on the occasion of the publication of the Indulgence in the provinces of Mainz and Magdeburg, and in the lands of the House of Brandenburg. To publish the Indulgence in the above-mentioned territories Albrecht appointed the Dominican John Tetzel,[8] who had acquired already considerable renown as a preacher. Tetzel was a man of solid education and of good moral standing, whose reputation as a successful popular preacher stood high in Germany at this period. Many grave abuses have been alleged against him by his enemies concerning his manner of carrying out the office entrusted to him by the archbishop, and in regard to his own private life serious crimes have been laid to his charge; but as a matter of history it is now admitted that Tetzel was a much maligned man, that his own conduct can bear the fullest scrutiny, and that in his preaching the worst that can be said against him is that he put forward as certainties, especially in regard to gaining indulgences for the souls of the faithful departed, what were merely the opinions of certain schools of theologians. Nor is it true to say that as the result of his activity vast sums of money made their way into the papal treasury. The accounts of the monies received during the greater portion of the time are now available, and it can be seen that when all expenses were paid comparatively little remained for either the Archbishop of Mainz or the building fund of St. Peter's.[9]