Rome's Capitoline Hill was the smallest of the Seven Hills of Rome. Yet in the long history of the Roman state it was the empire's holy mountain. The hill was the setting of many of Rome's most beloved stories, involving Aeneas, Romulus, Tarpeia, and Manlius. It also held significant monuments, including the Temple of Jupiter Optimus Maximus, a location that marked the spot where Jupiter made the hill his earthly home in the age before humanity. This...