Discover one of the largest underground burial sites in Rome with an entry ticket to the Catacombs of St. Callixtus. Explore the complex on a guided tour and learn about the martyrs, popes, and Christians buried here. Meet your guide and set out to explore the oldest official cemetery of Rome's Christian community. Hear where the complex gets its name and learn about its expansive size. Visit the Crypt of the Popes, where 9 popes and 3 bishops were laid to rest. Then, head to the adjoining room to see the Crypt of St. Cecilia, a Roman matron remembered for ensuring that many martyrs received a proper burial. Marvel at some of the oldest frescoes to decorate the walls in Rome's catacombs and visit Area I, where the cubicles of the sacraments are located. Leave your underground tour with a deeper understanding of Rome's early Christian communities and their burial traditions.