During the Heritage Days 2026, staged over the weekend of September 19–20, many religious sites will open their doors in Paris and Île-de-France. While cathedrals and grand churches naturally attract attention, abbeys, convents and monasteries also constitute a remarkable heritage, often more understated but just as rich in history. This event offers the opportunity to discover these places of life, prayer and transmission that have deeply marked the Île-de-France region over the centuries.
Behind their sometimes austere facades lie architectural ensembles with a wide range of fates. Some abbeys have withstood the Middle Ages, only to be reshaped over the centuries, while former convents have reinvented themselves as cultural venues, public buildings, or private properties. Other sites continue to serve their original purpose, hosting religious communities and preserving traditions that are sometimes centuries old.
These places also tell a turbulent story. The French Revolution profoundly disrupted monastic life: many congregations were dissolved, the buildings sold off as national property or repurposed for new uses. Yet a portion of this heritage survived, sometimes at the cost of significant transformations, allowing today a better understanding of how these religious ensembles evolved and their place in the History of Île-de-France.
Beyond their spiritual dimension, these abbeys, convents and monasteries also captivate with the diversity of their architecture. Cloisters ideal for a stroll, monastic gardens, chapter houses, old libraries, chapels or medieval ruins bear witness to the builders’ craftsmanship and centuries of history. Many of these spaces are usually closed to the public, which makes their opening during the Heritage Days particularly precious.
Heritage Days 2026: discover this former 17th-century convent in the Paris region.
On 19 and 20 September 2026, the Carmelite Convent in Avon will open its doors for Heritage Days. Discover this historic site in Seine-et-Marne. [Read more]
Heritage Days 2026 in Paris: free activities at the Musée des Arts et Métiers
The Museum of Arts and Crafts is taking part in Heritage Days on Saturday, September 19 and Sunday, September 20, 2026, offering a free tour and free activities that are especially popular with children. Click here to view the program! [Read more]
Hidden beneath an old convent, this Pontoise crypt will be exceptionally open to visitors for the 2026 Heritage Days.
In Pontoise, the crypt of the English Benedictine Convent will unusually open its doors on September 19 and 20, 2026. Discover this little-known landmark of Val-d'Oise heritage and its history. [Read more]
Heritage Days 2026: exclusive tours of Royaumont Abbey (95)
For the 2026 Heritage Days, on September 19 and 20, the Royaumont estate opens its doors for guided tours of the Abbey and its gardens. [Read more]
Heritage Days 2026: Visit the Couvent de la Merci in Paris during a special open day.
Heritage Days are back with a fresh edition slated for the weekend of September 19–20, 2026. In the 3rd arrondissement, don’t miss the special opening of the Couvent de la Merci. [Read more]
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Dates and Opening Time
From September 19, 2026 to September 20, 2026
