The Catacombs of Rome are ancient underground burial sites located beneath the city of Rome, Italy. They were primarily used by early Christians from the 2nd to the 5th centuries AD. These catacombs served as a place for burial and worship, reflecting the early Christian practice of honoring the dead. There are over 60 catacombs in Rome, with the most famous being the Catacombs of San Callisto and the Catacombs of San Sebastiano. The catacombs feature intricate frescoes, inscriptions, and burial niches, providing valuable insights into early Christian art and beliefs. Today, they are important archaeological sites and tourist attractions.