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Guided tour
Descend beneath St. Clement’s to see Rome’s history in layers, from medieval basilica to early-Christian church to a pagan Mithraic temple, all stacked underground.
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Step inside a working 12th-century basilica known for its gold mosaic apse and quiet, atmospheric nave.
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Descend to the 4th-century basilica below and see preserved frescoes that reveal early Christian worship.
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Go deeper to the Mithraic temple and view the carved altar where pagan rituals once took place.
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Follow your guide through corridors that show how Rome’s religious and cultural identities shifted over centuries.
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Hear the sound of an ancient underground water channel still flowing beneath the city.
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Guided tour of St. Clemente's Basilica Underground
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Access to the Basilica di San Clemente (all underground levels)
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Headsets
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- Food and drinks
You can cancel these tickets up to 24 hours before the experience begins and get a full refund.
Discover Rome’s history in layers—from a medieval basilica to ancient Christian worship spaces and a hidden pagan temple—on a guided underground journey beneath St. Clement’s.
Getting started
Meet your guide at the designated meeting point near the basilica. Your ticket will be validated before entry. Expect a brief security check. Headsets are provided so you can clearly hear your guide as you descend through the levels of the site.
What to expect
St. Clement’s Basilica (12th century)
A working Roman Catholic church known for its gold mosaic apse and quiet, atmospheric nave.
4th-Century Basilica (Lower Level)
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Early Christian worship site directly beneath the present church.
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Faded yet vivid fresco cycles that reveal how the space evolved over time.
Mithraic Temple (Deeper Level)
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Sanctuary dedicated to the cult of Mithras, preserved beneath the Christian layers.
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Carved altar and seating arrangement still intact, offering a rare glimpse into pagan ritual practice.
Underground River Channel
- A natural watercourse still running beneath the city, showing how ancient Rome adapted to shifting ground and structures.
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What to bring
Carry your voucher/ticket and a valid ID for entry verification.
What’s not allowed
Large bags and camera equipment are not permitted.
Photography is strictly prohibited inside the crypt.
Accessibility
The crypt has narrow passages and stairs; it is not wheelchair accessible and may be challenging for visitors with mobility limitations.
Additional information
A modest dress code is required (shoulders and knees covered).
- This is an active religious site; closures may occur due to services or events.
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Your voucher will be emailed to you shortly.
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Display the voucher on your mobile phone with a valid photo ID at the starting point.
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Please check your final voucher for the starting point details & specific instructions.
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