The Diet met in January 1521, but despite the efforts of Aleandro the majority of the princes still failed to realise the gravity of the situation. Feeling against Rome was running very high in Germany at the time. Many of the princes insisted on presenting a document embodying the grievances of Germany (/Centum Gravamina/)[20] to the papal ambassador, while even such an orthodox supporter of the Church as Duke George of Saxony, brought forward very serious complaints against the clergy, accompanied by a demand that a General Council should be summoned to restore peace to the Church. Luther, strengthened by the safe conduct of the Emperor and by a secret understanding with some of the princes and knights, set out from Wittenberg for Worms, where he arrived in April 1521. On presenting himself before the Diet he was invited to state if he were really the author of the works published under his name, copies of which were presented to him, and, if so, was he willing to retract the doctrines contained in them. In reply to the former of these questions he admitted the authorship of the volumes, but asked for time to consider what answer he should make in regard to the latter. A day was allowed him for consideration. When he appeared again, all traces of the hesitation and nervousness that marked his attitude at the previous session had disappeared. He refused to retract his opinions, and made it clear that he no longer acknowledged the authority of the Pope or of General Councils as a safe guide in matters religious. Thereupon the Emperor intimated to the princes that he was determined to take vigorous action against such a heretic and disturber of the public peace, though at the request of some of the princes he allowed time for private conferences between Luther and representative Catholic theologians, notably Eck and Cochlaeus.[21] These conferences having failed to produce any result the Emperor issued an order (25th April) commanding Luther to depart from Worms without delay, and forbidding him to preach to the people on his journey under pain of forfeiting his safe conduct. A month later Charles V. published a decree placing Luther under the ban of the Empire. He was denounced as a public heretic whom no one should receive or support; he was to be seized by any one who could do so, and delivered to the Emperor; his writings were to be burned, and all persons proved guilty of countenancing himself or his errors were liable to severe punishment. Many hoped that the decree might put an end to the confusion, but in reality Charles V. was powerless to enforce it, especially as the majority of the princes were unwilling to carry out its terms in their territories. Hence, outside the hereditary dominions of the House of Habsburg, the lands of Joachim I. of Brandenburg and of Duke George of Saxony, and in Bavaria, it remained a dead letter.