Heritage Days 2026: discover the Poincaré House, Paris's mathematics museum

Opening in September 2023 in the 5th arrondissement of Paris, the Maison Poincaré is dedicated to mathematics, its links with other scientific disciplines, and the influence it has on our society and everyday life. Children and adults alike can rediscover mathematics from a new angle, thanks to a tour and interactive modules. Physics, chemistry, but also philosophy, culture, arts... Mathematics is everywhere!

Maison Poincaré: we visited the very first mathematics museum in Paris
The Maison Poincaré, nestled in the heart of Paris's Latin Quarter, invites you to discover the capital's very first mathematics museum from September 30, 2023. Inspired by the world's greatest science museums, this unique venue promises to illuminate the history, influence and wonders of mathematics for all the curious! We tell you all about it! [Read more]

This Saturday, September 19, 2026, the Maison Poincaré opens its doors free of charge to the public for an exceptional weekend. The Paris museum is taking part in the 43rd edition of the Heritage Days, and offers special activities during these two days.

As every year, the Journées du Patrimoine captivate us with open doors, workshops, tours and extraordinary discoveries that let us explore the cultural and historical sites of Paris and d'Île-de-France. An unmissable date, to be experienced at the Maison Poincaré on Saturday 19 September 2026.

• To be read
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What’s on the agenda for the 2026 Heritage Days at the Poincaré House:

• Open House at the Poincaré House

  On the occasion of this edition of European Heritage Days, Maison Poincaré — the museum where math comes to life — opens its doors to everyone free of charge.

  Three 20-minute flash mediation sessions will be offered in the museum's exhibition spaces.

  Participation terms: Free | No reservation required

  Hours: Saturday, September 19, 2026 — 10:00 AM to 6:00 PM

• Flash mediation sessions at the Maison Poincaré

  On the occasion of this year’s European Heritage Days, Maison Poincaré — the museum where mathematics comes to life — opens its doors to everyone for free.

  Three 30-minute flash sessions will be offered across the museum’s exhibition spaces.

  Participation terms: Free | No reservation required

  Schedule: Saturday, September 19, 2026 — 2:30 PM to 2:50 PM, 3:30 PM to 3:50 PM, 4:30 PM to 4:50 PM

You won't want to go home after this visit: discover the other museums open during the Journées du Patrimoine.

Heritage Days 2026: Paris museums and art foundations across Île-de-France
During the 2026 Heritage Days, numerous museums and art foundations open their doors for free in Paris and the Île-de-France region. Mark your calendars for Saturday, 19 September and Sunday, 20 September 2026 to enjoy a program rich with exciting discoveries. [Read more]