The Upside-Down Nail Pact: The Vatican Blood and Mud Chronicles

Timeline: AD 64 (the Great Fire of Rome) → AD 337 (the death of Constantine) → AD 852 (the Leonine Wall) → AD 1377 (the return to Rome) → epilogue on the eve of the Renaissance

Main settings: the city of Rome, Vatican Hill, Nero's Circus, the catacombs, the construction site of the old St. Peter's Basilica, the medieval Borgo district, the Papal Palace of Avignon, and more