For almost a year, veteran National Geographic photographer Jim Stanfield captured nearly every corner of the Vatican, both the world's smallest country and the center of the Roman Catholic Church. Along with author Bart McDowell, he provides an insider's view into the history of this 108.7-acre enclave, from the first St. Peter's, built in the fourth century, through the amazing reign of Pope John Paul II, and beyond. Rarely seen areas of the complex,...