 When the fourth volume, "De justitia et jure", was about to be published, his superiors thought it proper that he should dedicate it to Pope Urban VIII; he had to present it himself to the pope, who was so much surprised and delighted by the theologian's learning that he frequently consulted him, and in 1643, created him a cardinal, a position he accepted with reluctance.The fine carriage sent by the Barberini to bring him as a cardinal to the pope's palace, he called his hearse.This put an end to de Lugo's teaching; but several of his works were published after 1643.