No Pope ever stood in a stronger position than Calixtus when in February 1120 he at last crossed the Alps. He was received with open arms by the Romans, and with more than ordinary loyalty by the Normans of the south. The Antipope fled before him, and was soon reduced to pitiful straits in his last refuge at Sutri. At last he was captured, contemptuously paraded through the Roman streets, and conveyed to prison, until, after peace had been restored to the Church, he was released to end his life obscurely in a monastery. [Sidenote: Negotiations renewed, 1121.] The Emperor saw that he had been too suspicious at Mouzon, and again wished to retire with dignity from a conflict in which his prospects of complete triumph had long utterly vanished. Things were now going better in Germany. In 1121 a Diet was held at Würzburg, at which Henry made peace with Adalbert of Mainz and the Saxon rebels. It was agreed to refer the investiture question to a German council under the Pope’s presidency, and direct negotiations with Rome were renewed. The Pope’s words were now exceedingly conciliatory. ‘The Church,’ he said, ‘is not covetous of royal splendour. Let her enjoy what belonged to Christ, and let the Emperor enjoy what belonged to the Empire.’ [Sidenote: Concordat of Worms, 1122.] On 8th September 1122 the council met at Worms. Calixtus, after some hesitation, did not attend himself, but sent Lambert, Bishop of Ostia, as his legate. Lambert was a citizen of Bologna, who had been archdeacon of his native town, and had learnt from its rival schools of Canonists and Civilians [see pp. 217–220] the principles involved in both sides of the controversy. He soon turned his knowledge and skill to good account. The council lasted little more than a week. The Emperor at first stood out for his rights, but was soon persuaded to accept a compromise such as had been suggested previously at Strasburg. On 23rd September the final Concordat of Worms was ratified, which put an end to the investiture strife. Two short documents, of three weighty sentences each, embodied the simple conditions that it had cost fifty years of contest to arrive at. ‘I, Henry,’ thus ran the imperial diploma, ‘for the love of God, the holy Roman Church, and of the lord Pope Calixtus, and for the salvation of my soul, abandon to God, the holy Apostles Peter and Paul, and to the holy Catholic Church all investiture by the ring and the staff, and I grant that in all the churches of my Empire there be freedom of election and free consecration. I will restore all the possessions and jurisdictions of St. Peter, which have been taken away since the beginning of this quarrel. I will give true peace to the lord Pope Calixtus and to the holy Roman Church, and I will faithfully help the holy Roman Church, whenever she invokes my aid.’ The papal diploma was even shorter. ‘I, Calixtus, the bishop,’ said the Pope, ‘grant to Henry, Emperor of the Romans, that the elections of bishops