While at Rome he met Christina of Sweden, who had abdicated her throne in order to become a Catholic. Ranke, in his "History of the Popes," devotes a whole chapter to this extraordinary woman, and she is referred to here merely because of her admiration for Vieira, and also to call attention to the fact that the first priest she spoke to about her conversion was the Jesuit, Antonio Macedo, who was the confessor of Pinto Pereira, the Portuguese ambassador to Sweden. The "Menology" tells us that Macedo did not wear his priestly dress in that country. He was the ambassador's secretary and interpreter, but he attracted the attention of the queen, who remembered no doubt that the Jesuit, Possevin, had appeared in the same court, in the time of John III, disguised as an officer. She finally asked Macedo about it, and he admitted that he was a Jesuit. Then began a series of conversations in Latin, which Christina spoke perfectly, as she did several other languages. She finally told him that she had resolved to become a Catholic, even if she forfeited her crown, and she commissioned him to inform the Sovereign Pontiff of her purpose. To reward Macedo she asked the Pope to make him a bishop, but as he had been a missionary in Africa, the mitre did not appeal to him, and he went back to Lisbon, where he died after sixty-seven years passed in the Society. Macedo's departure from Stockholm was so sudden that it excited comment, and possibly to persuade the public she had nothing to do with it, the queen pretended to despatch messengers in pursuit of him. In fact, she had requested the General of the Society to send some of the most trusted members of the Order to Sweden. It may be that the old African missionary, Macedo, was not skillful enough in elucidating some of the metaphysical problems which she was discussing. "In February, 1652," says Ranke, "the Jesuits who had been asked for arrived in Stockholm. They were two young men who represented themselves to be Italian noblemen engaged in travel, and in this character they were admitted to her table." They were Fathers Cavati and Molenia, who were able mathematicians as well as theologians. Descartes also was there about that time. The queen did not recognize the young noblemen in public, but, says Ranke: "as they were walking before her to the dining-hall, she said, in a low voice to one of them: 'Perhaps you have letters for me.' Without turning his head he replied that he had. Then, with a quick word, she bade him keep silence. On the following morning they were conducted secretly to the palace. Thus," continues Ranke, "to the royal dwelling of Gustavus Adolphus there now came ambassadors from Rome for the purpose of holding conferences with his daughter about joining the Catholic Church. The charm of this affair for Christina was principally the conviction that no one had the slightest suspicion about her proceedings."