Domitylli catacombs are located on Via Ostiensis in Rome. It is one of the largest and best preserved facilities of this type in the city. They extend over an area of 17 kilometers in underground cave systems. These are the only catacombs in Rome that still contain the bones of the first Christians. They probably arose in the third century and belonged to Domitylla - a woman from the family of Flavius Clement.
About 150,000 bodies were buried in the catacombs. They are entered through an underground church from the 4th century, which was discovered in 1593 and then reconstructed in 1872. Inside the cemetery you can see valuable frescoes dated to the 4th century, including one of the earliest images of Christ, scenes depicting imperial grain merchants in the company of two saints, transport of grain from the Mediterranean to Ostia and fragments from the Last Supper. Initially, relics of Saints Felix and Adauctus were kept in this place.