Rome has 60+ catacombs — underground burial networks carved from tufa rock, used by early Christians from the 2nd to 5th centuries AD. Total length: 600+ km of tunnels containing an estimated 750,000 graves. 6 are open to visitors. The question isn't whether to visit one — it's WHICH one. Each catacomb has a different character: San Callisto is the largest and has papal tombs. Priscilla has the oldest known painting of the Virgin Mary. San Sebastiano gave us the word "catacomb" itself. Underground Rome →
1. Catacombe di San Callisto (Via Appia Antica 110/126, €10, guided tours every 30 min). The largest and most important. 20km of excavated tunnels on 4 levels. The Crypt of the Popes — 9 popes from the 3rd century buried in one room, with original Greek inscriptions. The Crypt of Santa Cecilia (patron saint of music — her tomb was found here in 821 AD, body reportedly incorrupt). The frescoes: early Christian art (3rd century) depicting fish (Christ symbol), the Good Shepherd, Eucharistic bread and wine — the visual language of a religion inventing itself underground. Best for: first-timers, the most complete experience.
2. Catacombe di Priscilla (Via Salaria 430, €10, guided tours). The "queen of catacombs." Contains the oldest known painting of the Virgin Mary (early 3rd century — Mary seated, holding the infant Jesus, a prophet pointing to a star). Also: the oldest known depiction of the Annunciation and the Fractio Panis (Breaking of Bread — a Eucharistic banquet scene, the earliest representation of the Mass). Best for: early Christian art enthusiasts.
3. Catacombe di San Sebastiano (Via Appia Antica 136, €10). The catacomb that INVENTED THE WORD — kata kumbas ("near the hollows") was the original Greek name for this specific site, later applied to all underground cemeteries. St. Sebastian was buried here after being pierced with arrows. 3 elaborately decorated mausoleums (not just tunnels — actual rooms with stucco and fresco decoration). Best for: etymology nerds and those combining with Via Appia walk.
All catacombs: guided tours ONLY (you cannot enter alone — the tunnels extend for kilometers and you WILL get lost). Tours depart every 20-30 min, 45 min duration, multilingual guides. Temperature underground: 15°C year-round — bring a jacket in summer. Closed: San Callisto closed Wednesday. San Sebastiano closed Sunday. Priscilla closed Tuesday. Getting there: San Callisto/San Sebastiano: Bus 118 from Circo Massimo or Via Appia Antica walking (30 min from Terme di Caracalla). Priscilla: Bus 86/92 from Termini. Combine San Callisto + Via Appia Antica walk: The most atmospheric walk in Rome — ancient Roman road with pine trees, tombs, ruins, and catacombs. Guided catacomb + Appia tours on GYG →