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Rome Underground Basilica Tour 3 hr

TourTruth score 6.8 out of 10

Average

7 reviews · Rated on 1 provider · How we score

  • Rome, Italy
  • 3 hrs
  • Updated November 2, 2026

Explore San Clemente’s mosaics, underground basilicas, and ancient Roman remains on a guided small-group tour through historic Rome.

About this tour

Discover layers of history beneath Rome’s streets on a small-group guided tour of San Clemente Basilica and other remarkable religious sites. Meet your guide at the basilica’s main entrance, near the Colosseum, then admire its magnificent 12th-century mosaics before descending underground.

Explore an early Christian basilica and an ancient Roman temple, where the city’s changing beliefs and architecture come into view. Continue to the Basilica and Monastery of the Four Crowned Saints, a peaceful medieval sanctuary celebrated for its frescoes and historic character. The tour concludes at the Archbasilica of St. John Lateran, the oldest papal basilica in the Western world. Along the way, your guide connects art, religion, and Roman life across more than 2,000 years.

With a small group and expert commentary, this Rome Underground Basilica Tour offers a more intimate perspective on the city’s heritage. Book your visit to uncover the stories hidden beneath Rome.

Highlights

  • Admire the 12th-century mosaics at San Clemente
  • Descend to an early Christian basilica and ancient Roman temple
  • Explore the frescoes and medieval architecture of Four Crowned Saints
  • Discover the history of the Archbasilica of St. John Lateran

What's included

Included

  • Small-group guided tour
  • Admission tickets to St. Clement's Basilica
  • Guide's name and phone number provided the night before

Not included

  • Transportation
  • Food and drinks

Ratings on each provider

The ratings and review counts each booking site shows for this tour.

Important information

  • Not recommended for travelers with claustrophobia
  • Suitable for all physical fitness levels
  • Infants and small children can ride in a pram or stroller
  • Public transportation options are available nearby
  • Meet the guide in front of the main entrance, by the staircase leading below street level

How this score is calculated

This score is based on one provider. Viator rates it 4.43 from 7 reviews. We place that rating among all Viator ratings and weight it by its review count. If the tour is found on another provider later, both ratings are combined.

How the score works and rating distribution in Rome
  • Each provider rating is turned into a percentile: the share of that provider's ratings it beats, weighted by review counts.
  • Listings on different providers are combined in proportion to their review counts.
  • Tours with few reviews are pulled toward the average until more reviews come in, so a handful of perfect reviews can't top the list.
  • The result is shown from 0 to 10: this tour scores 6.8.

Provider rating distribution in Rome

How many tours in Rome have a provider rating at or below each value. The dashed line is this tour.

  • Viator

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