This little-known, mysterious underground network is open to visitors during the 2026 European Archaeology Days

European Archaeology Days return this year from June 12 to 14, 2026, in Paris and the Île-de-France region. In Sèvres, in Hauts-de-Seine, it’s a chance to explore a little-known part of the city’s heritage beneath its streets: the Caves du Roi. The program includes an off-the-beaten-path tour revealing a hidden treasure beneath the streets of Sèvres.

At the very start of June, cultural outings are all the rage in the Paris region! Barely has Nuit Blanche come to an end, and we’re already gearing up for another highlight on the calendar, aimed at history buffs and adventurers keen to explore the Paris region off the beaten track: the European Archaeology Days.

This year, the event runs from June 12 to 14, 2026, promising plenty of great deals and wonderful discoveries. In the Hauts-de-Seine, it’s also a chance to enjoy a free urbex-style exploration (but entirely legally), deep inside a still little-known network of underground medieval cellars: the Caves du Roi.

This unusual tour awaits beneath the streets of Sèvres, not far from Paris. One after another, you’ll discover different spaces that bear witness to the various activities that once took place here. First used to store wine destined for the court of Versailles, then as a brewery and a shelter during the Second World War, the Caves du Roi have had several lives—and still have plenty of secrets to reveal. The tour takes you from vaulted rooms to a winding maze, where you’ll find the remains of an icehouse, a spring and even a mysterious underground cathedral. The opening of reservations for the European Archaeology Days weekend will be announced on this page.

Please note that the route is quite long and includes stairs and uneven terrain, so be sure to wear clothes you don’t mind getting dirty and bring sturdy shoes. The visit is strongly discouraged for anyone with mobility issues.

The program for the 2026 European Archaeology Days at the Caves du Roi in Sèvres

Guided Tour of the King's Caves in Sèvres
### Guided Tours of the King of Sèvres Caves on June 13 and 14

Dates and times of the tours:

* Saturday, June 13, 2026: 10:30 AM · 2:00 PM + 4:00 PM

* Sunday, June 14, 2026: 10:30 AM · 2:00 PM + 4:00 PM

* A 4:00 PM slot added if the other two fill up.

* Online booking is mandatory.

* Reservations open: Wednesday, May 27.

As part of European Archaeology Days, every visit is free and led by Daniel Prodon, President of the Société d’Archéologie et d’Histoire de Sèvres.

Daniel has been a guide for more than seven years. Each tour aims to reveal a magical place rich in history.

Each slot comprises an approximately 1 hour 30 minutes guided tour, with a maximum of 18 participants.

Booking is open only to individuals and families.

Children under 8 years old and anyone with mobility difficulties (such as climbing or descending roughly three flights of stairs) are not admitted.

* Each reservation is in the name of the participant - no additional people can be added on the day.

There is no waitlist management.

Meeting point for the tours: the association’s offices, 2 Place du Colombier, 92310 Sèvres. Please arrive 15 minutes before the tour start time.
Participation requirements: Online registration is mandatory! A tour is limited to 18 participants. The tour is free, but not accessible to children under 8 or to people with limited mobility (particularly those who would struggle with climbing or descending the equivalent of three flights of stairs). - Free admission on an exceptional basis
Hours: Saturday, June 13, 2026 — 10:30–12:00, 14:00–15:30, 16:00–17:00, 17:00–17:30 | Sunday, June 14, 2026 — 10:30–12:00, 14:00–15:30, 16:00–17:30