Rome Underground Basilica Tour 2 hr - Image 1
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Rome Underground Basilica Tour 2 hr

TourTruth score 7.5 out of 10

GoodTop 24% in Rome

7 reviews · Rated on 1 provider · How we score

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

Descend beneath St. Clement’s Basilica on a private Rome tour of ancient temples, early Christian stories, frescoes, and an underground river.

About this tour

Step beneath Rome’s St. Clement’s Basilica and uncover a hidden world layered beneath the city streets. On this private guided visit, descend 46 feet (14 meters) into underground spaces shaped by ancient pagan rituals and early Christian history. Your guide brings the stories of persecution and the legend of St. Clement to life as you explore the basilica’s historic levels, admire ancient frescoes, and reach the water of an underground river. The Rome Underground Basilica Tour lasts 120 minutes and includes entrance to the Basilica di San Clemente, an expert live guide, and headsets. You can also select an extended option that adds a guided visit to Santo Stefano Rotondo; its itinerary may run in either order and can be affected by special events or liturgical celebrations. Meet at Piazza di San Clemente and arrive five minutes before your scheduled start. Wear comfortable shoes for the stairs, and cover your knees and shoulders to enter the churches. Choose the Rome Underground Basilica Tour for a close-up encounter with the stories and spaces hidden beneath the Eternal City.

Highlights

  • Descend 46 feet below St. Clement’s Basilica into layers of ancient history
  • Explore underground temples linked to pagan rituals and early Christian stories
  • Admire ancient frescoes and hear the legend of St. Clement
  • Touch the water of an underground river beneath the basilica

What's included

Included

  • Expert live guide
  • Headsets to hear the guide clearly
  • Luggage deposit at the office during the tour
  • Entrance fees to the Basilica di San Clemente
  • Guided tour of Santo Stefano Rotondo, only with the selected option

Not included

  • Hotel pickup and drop-off
  • Food and drinks
  • Optional gratuities
  • Guided tour of Santo Stefano Rotondo, unless selected during purchase

Ratings on each provider

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

Important information

  • Meet at Piazza di San Clemente, 00184 Rome, and arrive 5 minutes before the start; look for staff holding a yellow label
  • Church dress code requires covered knees and shoulders
  • Expect moderate walking and many steps and stairs; comfortable shoes are recommended
  • Not recommended for guests with claustrophobia
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  • Photography and filming are not allowed inside the basilicas; silence your phone
  • Pets are not allowed inside the basilicas
  • The tour may be affected by weather or liturgical events; if canceled, choose an alternative date or receive a full refund
  • The optional Santo Stefano Rotondo visit may be unavailable during special events or liturgical celebrations, and the itinerary may run in either order
  • Santo Stefano Rotondo’s martyrdom frescoes may not be appropriate for children
  • Infant seats are available; public transportation is nearby
  • Bringing your own headphones is recommended to reduce plastic waste

How this score is calculated

This score is based on one provider. Viator rates it 5.00 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 7.5. Top 24% in Rome means it ranks in the top 24% of tours in Rome by this score.

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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