Heritage Days 2026: Paris's Chaptal High School opens its doors to the public, exceptionally.

A new, 43rd edition of Heritage Days arrives on September 19 and 20, 2026! How about taking the opportunity to explore Lycée Chaptal during an open-house tour? See you this Saturday in the 8th arrondissement of Paris.

Peek behind the scenes of the Gaité Lyrique or get a glimpse of the other side of the Gare Montparnasse, enjoy a historical stroll in the Parc Monceau, and also delve into an extraordinary immersion into some ministries... This is the concept behind the Journées du Patrimoine, which, for 43 editions now, invites the curious and the lovers of our rich patrimoine to push open the doors of exceptional, unusual, hidden, and little-known places.

Heritage Days 2026 in Paris (75): a district-by-district lineup of visits
For the 2026 Heritage Days in Paris, the capital’s monuments and historic sites throw open their doors (often for free) to reveal their secrets to us. Don’t miss this essential event, scheduled for the weekend of September 19–20, 2026, under the themes: "Heritage in Peril" and "Heritage of Photography". [Read more]

Heritage Days 2026 in Paris and Île-de-France: tours you can visit without booking
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During these essential Heritage Days, some museums and monuments attract big crowds. But other venues deserve a look as well, such as lycées. Hosting many students for ten months a year, certain Parisian high schools are full of secrets and boast distinctive architecture. The case in point is Lycée Chaptal.

Nestled in the 8e arrondissement of the capital, just a stone’s throw from the Batignolles, the Chaptal High School was founded by the educator and playwright Prosper Goubaux. As for its name, it references the French scholar, chemist, physician and politician Jean-Antoine. So come join the Heritage Days 2026 to learn more about this highly regarded high school in the capital and to discover its museum on Saturday, September 19!

Heritage Days 2026 at Chaptal High School in Paris

Tour of the Chaptal School Campus
Self-guided tour of the Chaptal school campus and its museum.
Participation requirements: Free | No reservation required
Schedule: Saturday, September 19, 2026 — 1:30 PM to 6:30 PM