The archiepiscopate of Mainz was, both temporally and spiritually, one of the most powerful of the ecclesiastical principalities of Germany. To the Archbishop Siegfrid, Gregory sent the canon of 1074 with instructions similar to those contained in his epistle to Otho of Constance. In reply, Siegfrid promised implicit obedience; but, recognizing the almost insuperable difficulties of the task assigned him, he temporized, and gave his clergy six months in which to make up their minds, exhorting them to render willing obedience and relieve him from the necessity of employing coercion. At the expiration of the period, in October, 1074, he assembled a synod at Erfurt, where he boldly insisted that they should give up their wives or abandon their functions and their benefices. Their arguments and entreaties were in vain. Finding him immovable, they retired for consultation, when some proposed to separate and return home at once, without further parley, and thus elude giving sanction to the new regulations; while bolder spirits urged that it would be better to put the archbishop to instant death, before he could promulgate so execrable a decree, thus leaving for posterity a shining example, which would prevent any of his successors from attempting so abominable an enterprise. Siegfrid’s friends advised him of the turn which affairs were likely to take. He therefore sent to his clergy a request that they would reassemble in synod, promising that he would take the first opportunity to apply to Rome for a relaxation of the canon. They agreed to this, and, on meeting them the next day, Siegfrid astutely started the question of his claims on the Thuringian tithes, which had shortly before been settled by the Saxon war. Indignant at this, the Thuringian clergy raised a tumult, flew to arms, and the synod broke up in the utmost confusion. In December, Gregory wrote to the shuffling archbishop an angry letter, reproaching him with his lukewarmness in the cause, and ordering him to present himself at the synod announced for the coming Lent. Siegfrid obediently went to Rome, but was with difficulty admitted to communion. What promises he made to obtain it were not kept, for again in September, 1075, Gregory addressed him with commands to enforce the canons. Stimulated by this, Siegfrid convoked a synod at Mainz in October, where the Bishop of Coire appeared with a papal mandate threatening him with degradation and expulsion if he failed in compelling the priests to abandon either their wives or their ministry. Thus goaded, Siegfrid did his best, but the whole body of the clergy raised such a clamor and made demonstrations so active and so formidable that the archbishop saw little prospect of escaping with life. The danger from his mutinous flock was more instant and pressing than that from the angry pope; his resolution gave way, and he dissolved the synod, declaring that he washed his hands of the