Heritage Days 2026: Self-guided tour of Chaptal High School in 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): the program of visits to explore by arrondissement
Heritage Days are back in Paris in 2026. The capital’s monuments and historic landmarks open their doors (often free of charge) to reveal their secrets to us. Don’t miss this must-attend event, slated for the weekend of September 19–20, 2026, with the themes: “Heritage in Peril” and “The Heritage of Photography.” [Read more]

Heritage Days 2026 in Paris and Île-de-France: tours available without reservation
Heritage Days are back this weekend, September 19–20, 2026, in Paris and the Île-de-France region. Still not mapped out your plan? Here are sites that are open without prior booking for free, self-guided visits you can drop in on at the last minute. [Read more]

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!

• To be read
• Heritage Days 2026 in Paris and Île-de-France: book your weekend tours now.
• Heritage Days 2026: Paris and Île-de-France's marquee institutions to visit
• Heritage Days 2026 in Paris (75): the program of visits to explore by arrondissement

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