Catacombs of Marcellinus and Peter — Wikipedia

The Catacombs of Marcellinus and Peter are found approximately three kilometers from southeast Rome and the ancient Via Labicana, and date to the 4th century AD. The catacombs were named in reference to the Christian martyrs Marcellinus and Peter who may have been buried there according to legend, near the body of St. Tiburtius. During excavations performed from 2004 to 2010, an estimated 20,000 skeletons were discovered in these catacombs; the skeletons were buried in loculi (individually buried within a niche), arcosolia (a burial under an arched recess), or cubicala (individuals grouped...