Owing to the war with France it was not until the year 1555 that the proposed Diet met at Augsburg. The Protestant party, encouraged by their victories, were in no humour for compromise, and as it was evident that there was no longer any hope of healing the religious division in the Empire, it was agreed that peace could be secured only by mutual toleration. In September 1555 the Peace of Augsburg was concluded. According to the terms of this convention full freedom of conscience was conceded in the Empire to Catholics and to all Protestants who accepted the Augsburg Confession. The latter were permitted to retain the ecclesiastical goods which they had already acquired before the Treaty of Passau (1552). For the future each prince was to be free to determine the religion of his subjects, but in case a subject was not content with the religion imposed on him by his sovereign he could claim the right to migrate into a more friendly territory. A great difficulty arose in regard to the disposal of the ecclesiastical property in case a Catholic bishop or abbot should apostatise. Notwithstanding the protests of the Protestant party, it was decreed that if such an event should occur the seceder could claim his own personal property, but not the property attached to his office. This clause, known as the /Ecclesiasticum Reservatum/, gave rise to many disputes, and was one of the principal causes of the Thirty Years' War. By the /Peace of Augsburg/ Protestantism was recognised as a distinct and separate form of Christianity, and the first blow was struck at the fundamental principles on which the Holy Roman Empire had been built. Charles V. was blamed at the time, and has been blamed since for having given his consent to such a treaty, but if all the circumstances of the time be duly considered it is difficult to see how he could have acted otherwise than he did. It is not the Emperor who should be held accountable for the unfavourable character of the Augsburg Peace, but "the most Catholic King of France" who allied himself with the forces of German Protestantism, and the Catholic princes who were more anxious to secure their own position than to fight for their sovereign or their religion. Charles V., broken down in health and wearied by his misfortunes and his failure to put down the religious revolt, determined to hand over to a younger man the administration of the territories over which he ruled, and to devote the remainder of his life to preparation for the world to come. In a parting address delivered to the States of the Netherlands he warned them "to be loyal to the Catholic faith which has always been and everywhere the faith of Christendom, for should it disappear the foundations of goodness should crumble away and every sort of mischief now menacing the world would reign supreme." After his resignation he retired to a monastery in Estremadura, where he died in 1558. Spain