The Catacombs of San Sebastiano are ancient burial sites located in Rome, Italy. They date back to the 2nd century AD and are part of a larger network of catacombs that served as underground cemeteries for early Christians. The catacombs are named after Saint Sebastian, a Christian martyr, and feature intricate frescoes and inscriptions that provide insight into early Christian beliefs and practices. These catacombs are notable for their unique architecture, including narrow passageways and burial niches carved into the walls. Visitors can explore the site to learn about the history of early Christianity and the significance of burial practices in ancient Rome. The Catacombs of San Sebastiano are an important archaeological and cultural landmark.