Saint Sebastian's catacombs, situated in Via Appia, are very important because historians believe that this place had hosted Saints Peter and Paul bodies. They are located in a slope that has always been used as a cemetery also before the Christianism, later it was converted in a cemetery for slaves and freedmen.

The catacombs of St. Callixtus are among the greatest and most important of Rome. They originated about the middle of the second century and are part of a cemeterial complex which occupies an area of 90 acres, with a network of galleries about 12 miles long, in four levels, more than twenty meters deep. In it were buried tens of martyrs, 16 popes and very many Christians. You will also admire the Crypt of St. Cecilia: the popular patron saint of music, she was martyred and entombed where the statue now lies.

The Catacombs of Rome (Italian: Catacombe di Roma) are ancient catacombs, underground burial places under Rome, Italy, of which there are at least forty, some discovered only in recent decades. Though most famous for Christian burials, either in separate catacombs or mixed together, people of all the Roman religions are buried in them, beginning in the 2nd century AD, mainly as a response to overcrowding and shortage of land.