His position in Rome was increasingly difficult. He had the affection of Pope Urban VIII, but he was disliked by Cardinal Barberini, the chief of Papal diplomacy, and by the large contingent of Spaniards in the Vatican household. He spent his time collecting sculpture and other works of art which he sent to Richelieu for the Cardinal's new palace in Paris. He considered serving the rulers of Savoy, Poland, or Queen Henriette of England, but in the end he decided to enter the service of Richelieu and France. However, Richelieu was in no hurry to bring him to Paris; he valued the diplomatic contributions Mazarin was making in Rome, as well as the art treasures he was acquiring. He kept Mazarin in Rome for two more years. Richelieu did one important favor for Mazarin; in October 1638 he put forward Mazarin's name as a candidate for Cardinal when the next vacancy opened up. In December 1638, when a sitting Cardinal died, Mazarin was nominated as a Cardinal. He had to wait the entire year of 1639 before his new position was confirmed. Then on 14 December 1639, he departed Rome for the port of Civitavecchia, boarded an armed French ship to Marseille, and then traveled from Lyon to Paris, where he arrived on 5 January 1640.