Guided tour

Rome: Underground Temples of St. Clement's Basilica Tour

Rome: Underground Temples of St. Clement's Basilica Tour

From US$ 66.79 per person

Venture 14 meters below St Clement's Basilica to discover a mystical world of forgotten pagan cults, early-Christian legends and frescoes.

About this activity

Free cancellation
Cancel up to 24 hours in advance to receive a full refund
Covid-19 precautions
Special health and safety measures apply. Learn more
Mobile ticketing
Use your phone or print your voucher
Duration 1 hour
Check availability to see starting times.
Instant confirmation
Live tour guide
English, Russian, Italian, Spanish, French, German, Portuguese, Chinese
Private or small groups available


  • Jump into a surprising exploration close to the Colosseum
  • Venture 14 meters below ground
  • Discover an ancient Mithraic Temple and an underground river
  • Be amazed by the fascinating golden mosaic
  • Enjoy the quality of a private or small group tour
Full description
Cross three layers of history and earth as you venture 14 meters below St Clement's Basilica. Discover the best-preserved Mithraic temple of the City 14 meters underground. Find out about the pagan cult of Ancient Romans before Christianity and be intrigued by its sectarian and esoteric side. Meet your guide after checking in at the meeting point and head towards Rome's best-kept secret. Learn about the early-Christian persecutions, martyrs and hear the legend of St. Clement, while standing in the 1st Century structure that was once his home. Feel the eerie atmosphere and touch the waters of an underground river. Journey higher into the remains of the 4th Century Underground Basilica, built on top of the martyr’s house and below the actual one. Walk along its imposing walls and be fascinated by the ancient frescoes while learning about the scenes and the lives of the martyrs they portray. End your tour in the beautiful 12th-century Basilica at ground level. Marvel at the stunning golden mosaic in the apse, and learn about the hidden symbolism in it.
  • Underground entrance ticket
  • Live professional guide
  • Sterilised headsets
  • One mask for person if required
  • Full on-site assistance
  • Luggage deposit for the duration of the tour
    Not suitable for
    • People with claustrophobia
    • Wheelchair users
    Covid-19 precautions

    You must book this activity online because the ticket office is closed

    Safety measures in place
    • All required protective equipment is provided
    • All areas that customers touch are frequently cleaned
    • The number of visitors is limited to reduce crowds
    Traveler requirements
    • You must bring your own headphones
    • You must fill out a travel information form
    • You will receive a mandatory temperature check

    Select participants and date



    Prepare for the activity

    Meeting point

    Meet at the TouriksPoint at Via di San Giovanni in Laterano 132, 15 meters from the Basilica of St. Clement. Please arrive 5 minutes before your scheduled start time.

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    Important information

    What to bring

    • Comfortable shoes

    Not allowed

    • Short skirts
    • Sleeveless shirts

    Know before you go

    • This tour is subject to weather conditions and/or liturgic-calendar events. If canceled you will be given the option of an alternative date or full refund
    • We suggest you do not trash your empty bottle of water since you can refill it everywhere in Rome for free
    Customer reviews

    Overall rating

    5 /5

    based on 4 reviews

    Review summary

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    Star rating:

    San Clemente was the absolute surprise highlight of our Rome vacation. The underground temples were nothing short of impressive. Our German-speaking guide Lorenzo was very enthusiastic and competent, in addition, he had excellent German language skills (unlike many other “German-speaking” guides we got to know in Rome). The bottom line is an insider tip that is absolutely worth seeing.

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    September 16, 2021

    Very interesting visit, church rich in history and beautiful mosaics, archaeological excavations to appreciate with the help of the guide.

    June 30, 2021

    La basilica di San clemente è una chicca da non perdere

    August 12, 2021

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    Product ID: 390177