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

Dive deep into Rome’s hidden history with an unforgettable 1-hour journey beneath St. Clement’s basilica. Venture 14 meters underground to discover one of the city’s best-preserved Mithraic temples, a mysterious relic of ancient Roman pagan cults. Explore the esoteric rites of the Romans before Christianity and the secrets of their forgotten beliefs.

Your adventure begins at the stunning 12th-century basilica, where your guide will introduce you to the breathtaking golden mosaic in the apse, revealing its hidden symbolism and its spiritual significance. Next, you will descend 14 meters beneath the basilica to explore the fascinating 4th-century underground church, built directly atop the home of St. Clement, the third pope of Rome. Witness some of the earliest Christian frescoes, depicting the lives and martyrdoms of early Christians and learn about the persecution they faced.

Continue your descent to discover one of the best-preserved Mithraic temples in Rome - an extraordinary relic of ancient Roman paganism. This hidden gem offers a rare glimpse into the Mithraic cult that flourished before Christianity. Your guide will unravel the fascinating rituals and beliefs of this enigmatic sect, providing an intriguing look at Rome’s religious landscape before the rise of Christianity.

Feel the eerie atmosphere as you explore the site, and witness the waters of an underground river, adding an extra layer of mystery to your experience. As you emerge back into the 12th-century basilica, reflect on the incredible journey through time you’ve just experienced.

For those eager to dive deeper into early Christian history, extend your tour with a 45-minute visit to the nearby Santo Stefano Rotondo. Explore its unique circular architecture and haunting frescoes depicting early Christian martyrdom - an evocative continuation of the stories you’ve just uncovered.

This tour is perfect for those seeking to explore Rome off the beaten path. With its rich history and breathtaking art, both basilicas offer an unforgettable glimpse into the heart of early Christian Rome.

Please note: In the event that certain areas of one of the churches are closed, your guide will adapt the itinerary by highlighting alternative sites. As a result, the overall duration will remain unchanged

Not suitable for

• People with claustrophobia
• Wheelchair users

What to bring

• Comfortable shoes

Not allowed

• Alcohol and drugs
• Food and drinks
• Pets
• Photography inside
• Short skirts
• Shorts
• Sleeveless shirts
• Video recording
• Weapons or sharp objects

Know before you go

• Due to the architectural structures inside and under the Basilica di San Clemente, this tour unfortunately is not accessible to wheelchair users
• Due to the underground spaces within the Basilica di San Clemente, this tour may not be suitable for individuals with claustrophobia
• If you choose to extend your tour with the optional visit to Santo Stefano Rotondo, please note that the itinerary may vary. Depending on the schedule, you may begin your visit at Basilica San Clemente and proceed to Santo Stefano Rotondo, or vice versa
• Please note that the extended option with Santo Stefano Rotondo may occasionally be unavailable due to special events or liturgical celebrations
• The frescoes inside the Basilica di Santo Stefano Rotondo depict graphic scenes of martyrdom and may not be appropriate for children
• 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