CHRISTIAN CATACOMBS AND ST. CLEMENTE BASILICA

Beneath Rome’s streets, the dead were buried in their millions. The catacombs — underground cemetery complexes carved from the soft volcanic tufa outside Rome’s ancient walls — are one of early Christianity’s most important legacies, and one of the most atmospheric places in Italy. Combined with the extraordinary layered archaeological site of San Clemente, Kai Travel’s private Catacombs and San Clemente tour is the most complete immersion in early Christian Rome available.

The Catacombs: Christianity’s Underground World

The catacombs were dug from the 2nd century AD onwards as underground burial spaces for Rome’s early Christian and Jewish communities. Roman law prohibited burial within the city walls, so Christians excavated a series of tunnels and chambers in the volcanic rock outside — eventually creating a network of passages that, if laid end to end, would stretch for hundreds of kilometres under the Roman countryside.

The most accessible and historically significant catacombs are those on the Via Appia Antica — the Appian Way, one of Rome’s ancient consular roads whose paving stones still bear the ruts of ancient carts. The Catacombs of San Callisto, San Sebastiano and Domitilla together contain the remains of several early popes and hundreds of thousands of ordinary Christians. Your guide will lead you through the tunnels, explaining the burial practices, the development of Christian iconography on the tomb walls — the fish (ichthys) symbol, the dove, the chi-rho monogram, the Good Shepherd — and the role the catacombs played in early Christian community, worship and the veneration of martyrs.

The atmosphere underground is extraordinary: cool, still, dimly lit, the walls honeycombed with the rectangular niches (loculi) where bodies were sealed behind terracotta tiles, each marked with a painted name or symbol. Your guide creates a human connection to these spaces that transforms them from archaeological curiosities into places of genuine emotional resonance.

San Clemente: Three Levels of History

After the catacombs, your tour moves to the Basilica of San Clemente near the Colosseum — one of Rome’s most remarkable layered sites. The 12th-century church at street level is itself exceptional: beautiful medieval apse mosaics, a schola cantorum (a raised choir platform) that predates most Western religious music, and frescoes depicting the life of St. Clement in a narrative style that anticipates Giotto by a full century. Descend one level and you enter the 4th-century basilica that preceded it — the wall frescoes fragmentarily intact, including scenes from the life of St. Clement and a remarkable sequence depicting a miracle performed with the assistance of a sceptical husband who doesn’t believe his blind wife has been cured.

Descend again, down to Rome’s original street level, and you reach the 1st-century Roman buildings below: a private house, a large commercial building, and the Mithraeum — the underground cult room where followers of Mithras held their secret rituals. The sound of an ancient underground stream accompanies you here — water that has been flowing beneath Rome since before the city existed, still draining as it always has into the Cloaca Maxima, the ancient sewer that was the engineering marvel of its age.

What’s Included

Entry tickets to the catacombs and to San Clemente (including underground levels), a dedicated private guide specialising in early Christian Rome and Roman archaeology, and flexible routing. Duration approximately three hours. Groups of any size accommodated.

Practical Information

The catacombs are located on the Via Appia Antica outside Rome’s ancient walls — reachable by taxi, the Archeobus, or a short walk from the Colli Albani metro station. Kai Travel can arrange private transport from central Rome as part of the tour logistics. The underground passages of the catacombs are cool (a constant 15°C year-round) and dimly lit; a light layer is recommended regardless of the external temperature, and comfortable, closed-toe shoes are essential on the uneven stone surfaces. The San Clemente visit follows the catacombs and is located in central Rome near the Colosseum, requiring a short transit between the two sites. The full tour typically runs three hours including travel between sites. Both the catacombs and San Clemente are closed on certain religious holidays; Kai Travel will confirm any closures relevant to your tour date at the time of booking.

Book This Tour

Underground Rome tells a story that the surface cannot. Book Kai Travel’s private Catacombs and San Clemente tour and trace two thousand years of Roman religious history through its most atmospheric spaces.