Under the footbridge of Notre-Dame, there exists a Paris that is not always apparent at first glance. There, just beneath the steps of walkers and the curious, the Archaeological Crypt of the Île de la Cité unfolds more than two thousand years of urban history, like a buried stage that tells, stone by stone, how Lutetia became Paris. On the occasion of the European Archaeology Days, organized this year over the weekend of June 12–14, 2026, this secret hidden in the heart of the capital invites us to a special program!
The Paris archaeological crypt under Notre-Dame Cathedral
The archaeological crypt beneath the forecourt of Notre-Dame in Paris is a real step back in time. Here's what to expect when you visit. [Read more]
That venue is especially suited to it: The Crypt houses the remains uncovered during excavations carried out between 1965 and 1970 beneath the Notre-Dame forecourt, and today offers an exceptional panorama of the evolution of Île de la Cité, Paris’s historic heart. Here you can trace the traces of a quay from Ancient Lutetia, the remains of a Gallo-Roman thermal complex, a stretch of early 4th‑century city walls, as well as medieval, classical elements and the more modern urban developments of the city.
Interactive tour: Archaeology Mission
With the help of a short questionnaire, discover the remnants of the ancient city of Lutetia and the techniques used to preserve traces of an ancient civilization.
On-site registration on the day of the activity, subject to limited availability
Participation terms: Family, children aged 7 and up - Free | Special free admission
Timetable: Saturday, June 13, 2026 — 10:00 to 11:30 | Sunday, June 14, 2026 — 10:00 to 11:30
Visit: Exploring the Crypt and the Exhibition
This tour offers a chance to explore the exhibition Dans la Seine. Objets trouvés de la Préhistoire à nos jours. It also reveals the exceptional artifacts preserved in the Archaeological Crypt.
On-site registration on the day of the activity, while spaces last
Participation terms: Exceptional free admission | Free
Schedule: Saturday, June 13, 2026 – 11:30 AM to 12:30 PM, 4:00 PM to 5:00 PM | Sunday, June 14, 2026 – 11:30 AM to 12:30 PM, 4:00 PM to 5:00 PM
“Under and Over” Tour
Starting at the Archaeological Crypt on Île de la Cité, you'll uncover the ruins of the city's oldest quarter. Then carry on the tour on the forecourt and around Notre-Dame Cathedral.
Participation conditions: Special complimentary offer | Free
Schedule : Saturday, June 13, 2026 — 2:30 PM to 4:00 PM | Sunday, June 14, 2026 — 2:30 PM to 4:00 PM
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Dates and Opening Time
From June 13, 2026 to June 14, 2026
Location
The archaeological crypt on the Île de la Cité
1 Place du Parvis Notre-Dame
75004 Paris 4
Route planner
Official website
www.crypte.paris.fr
The Paris archaeological crypt under Notre-Dame Cathedral
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