Over 50 billion dollars in securities. Gold reserves that exceed those of industrialized nations. Real estate holdings that equal the total area of many countries. Opulent palaces containing the world's greatest art treasures. These are some of the riches of the Roman Catholic Church. Yet in 1929 the Vatican was destitute. Pope Pius XI, living in a damaged, leaky, pigeon-infested Lateran Palace, could hear rats scurrying through the walls, and he...