On the persecution of these insubordinate brethren Michele da Cesena could afford to look with complacency, and he evidently desired to regard the bull of August, 1327, as directed against them. He maintained his attitude of submission. In June the pope had summoned him from Rome to Avignon, and he had excused himself on the ground of sickness. His messengers with his apologies were graciously received, and it was not until December 2 that he presented himself before John. The pope subsequently declared that he had been summoned to answer for secretly encouraging rebels and heretics, and doubtless the object was to be assured of his person, but he was courteously welcomed, and the ostensible reason given for sending for him was certain troubles in the provinces of Assisi and Aragon, in which Michele obediently changed the ministers. Until April, 1328, he remained in the papal court, apparently on the best of terms with John.[154]
Meanwhile the quarrel between the empire and the papacy had been developing apace. In the spring of 1326 Louis suddenly and without due preparation undertook an expedition to Italy, at the invitation of the Ghibellines, for his imperial coronation. When he reached Milan in April to receive the iron crown John sternly forbade his further progress, and on this being disregarded, proceeded to excommunicate him afresh. Thus commenced another prolonged series of citations and sentences for heresy, including the preaching of a crusade with Holy Land indulgences against the impenitent sinner. Unmoved by this, Louis slowly made his way to Rome, which he entered January 7, 1327, and where he was crowned on the 17th, in contemptuous defiance of papal prerogative, by four syndics elected by the people, after which, according to usage, he exchanged the title of King of the Romans for that of Emperor. As the defender of the faith he proceeded to try the pope on the charge of heresy, based upon his denial of the poverty of Christ. April 14 he promulgated a law authorizing the prosecution and sentence _in absentia_ of those notoriously defamed for treason or heresy, thus imitating the papal injustice of which he himself complained bitterly; and, on the 17th, sentence of deposition was solemnly read to the assembled people before the basilica of St. Peter. It recited that it was rendered at the request of the clergy and people of Rome; it recapitulated the crimes of the pope, whom it stigmatized as Antichrist; it pronounced him a heretic on account of his denying the poverty of Christ, deposed him from the papacy, and threatened confiscation on all who should render him support and assistance.[155]