On Saturday September 20 and Sunday September 21, we're taking advantage of the not-to-be-missed event of the 2025 autumn season: we're talking about the European Heritage Days, a major weekend in Paris, the Île-de-France region and even throughout Europe.
So, now's the time to visit our must-see Parisian landmarks, places of power and historic squares, but also to discover little-known, secret places on truly unusual tours. While Paris is THE destination of choice for these Journées du Patrimoine 2025, the rest of the Île-de-France region also has a lot to offer!
In Essonne, the town of Juvisy-sur-Orge is not to be outdone for these Journées Européennes du Patrimoine 2025. And with good reason: this is your chance to (re)discover this small town, stroll through the streets lined with old houses, discover theSaint-Martin church or stroll along the peaceful banks of the River Orge. And don't forget to visit the Parc de la Mairie, or take a picnic to eat on site. It's already shaping up to be a jam-packed program in Juvisy-sur-Orge, on Saturday September 20 and Sunday September 21, 2025!
Church of Notre-Dame de France
Guided tour of Juvisy’s Notre-Dame de France Church
The Friends of Juvisy’s Church association offers continuous guided tours of Notre-Dame-de-France Church on Saturday and Sunday afternoons. The church is also open to the public on Saturdays and Sundays from 9 a.m. to 6 p.m. Informational panels are displayed inside the church for self-guided visits.
Participation requirements: Free | No reservation required
Schedule: Saturday, September 19, 2026 — 2:00 PM to 5:00 PM | Sunday, September 20, 2026 — 2:00 PM to 5:00 PM
Camille Flammarion Observatory
Tour of the Flammarion Observatory in Juvisy
Guided tour of the Observatory, Camille Flammarion’s former residence, the 19th-century astronomer. A demonstration of the Great Telescope housed beneath the dome. Tours depart every 30 minutes with a guide.
Free exploration of the park: association stalls, live music
Participation guidelines: Groups limited to 18 people in the dome - Free | No reservation required
Hours: Saturday, September 19, 2026 — 10:00 AM to 1:00 PM, 2:00 PM to 6:00 PM | Sunday, September 20, 2026 — 10:00 AM to 1:00 PM, 2:00 PM to 6:00 PM
Dates and Opening Time
From September 20, 2025 to September 21, 2025
Location
Juvisy-sur-Orge
juvisy-sur-orge
91260 Juvisy sur Orge
Route planner
Official website
juvisy.fr
