After a preliminary agreement with the Emperor, Paul III. convoked the General Council to meet at Mantua in 1537; but the refusal of the Lutheran princes to send representatives, the prohibition issued by Francis I. against the attendance of French bishops, and the unwillingness of the Duke of Mantua to make the necessary arrangements for such an assembly in his territory unless under impossible conditions, made it necessary to prorogue the council to Vicenza in 1538. As hardly any bishops had arrived at the time appointed it was adjourned at first, and later on prorogued indefinitely. Negotiations were, however, continued regarding the place of assembly. The Pope was anxious that the council should be held in an Italian city, while Charles V., believing that the Lutherans would never consent to go to Italy or to accept the decrees of an Italian assembly, insisted that a German city should be selected. In the end as a compromise Trent was agreed upon by both parties, and the council was convoked once more to meet there in 1542. The refusal of the Lutherans to take part in the proposed council, the unwillingness of Francis I. to permit any of his subjects to be present, and the threatened war between France and the Empire, made it impossible for the council to meet. Finally, on the conclusion of the Peace of Crepy (1544), which put an end to the war with France, the council was convoked to meet at Trent in March 1545, and Cardinals del Monte, Reginald Pole, and Marcello Cervini were appointed to represent the Pope. When the day fixed for the opening ceremony arrived, a further adjournment was rendered imperative owing to the very sparse attendance of bishops. The First Session was held on the 13th December 1545, and the second in January 1546. There were then present in addition to the legates and theologians only four archbishops, twenty-one bishops, and five generals of religious orders.