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European Heritage Days 2026 in Val-d'Oise: 9 castles open

The 9 château openings recorded in Val-d'Oise for the European Heritage Days on 19 and 20 September 2026, with their opening times and what we know about free admission.

All château entries Val-d'Oise

• Sat, September 19 · 9:30 AMFree

  Opening of the new exhibition "Couronner le ciel, épis de faîtage et décors de toiture de la Renaissance française"

  château d'Écouen · Écouen

  Val-d'Oise

• Sat, September 19 · 9:30 AMFree

  Self-guided tour

  château d'Écouen · Écouen

  Val-d'Oise

• Sat, September 19 · 10:00 AM

  Discovering the Château de La Roche-Guyon during the Second World War

  château de La Roche-Guyon · La Roche-Guyon

  Val-d'Oise

• Sat, September 19 · 10:00 AMFree

  Exhibition "Van Gogh influencer, heritages in motion" at the Château d'Auvers

  château d'Auvers · Auvers-sur-Oise

  Val-d'Oise

• Sat, September 19 · 10:00 AM

  History & Memory, "The voices of the casemates, 1944", created by Tomasz Namerła

  château de La Roche-Guyon · La Roche-Guyon

  Val-d'Oise

• Sat, September 19 · 10:00 AMFree

  The castle of Vigny through the ages

  château de Vigny · Vigny

  Val-d'Oise

• Sat, September 19 · 10:30 AMFree

  Visit of Beaumont sur Oise during the resistance

  château de Beaumont-sur-Oise · Beaumont-sur-Oise

  Val-d'Oise

• Sat, September 19 · 1:00 PMFree

  Exhibition William Thornley: the secrets of his workshop

  Château de Grouchy · Osny

  Val-d'Oise

• Sat, September 19 · 2:00 PMFree

  From the construction site to the exhibition "Couronner le ciel"

  château d'Écouen · Écouen

  Val-d'Oise

• Sat, September 19 · 2:00 PMFree

  Corinne Poplimont Exhibition

  Château de Grouchy · Osny

  Val-d'Oise

• Sat, September 19 · 2:00 PMFree

  Family game: Flight to the Château de Busagny

  Château de Grouchy · Osny

  Val-d'Oise

• Sat, September 19 · 2:00 PMFree

  Open doors at the Saint-Pierre-aux-Liens Church

  Château de Grouchy · Osny

  Val-d'Oise

• Sat, September 19 · 2:00 PMFree

  Visit of the outside, the Orangerie and the park of the Château de Montgeroult

  château de Montgeroult · Montgeroult

  Val-d'Oise

• Sat, September 19 · 2:30 PM

  Guided tour of the interiors of Montgeroult castle

  château de Montgeroult · Montgeroult

  Val-d'Oise

• Sat, September 19 · 3:00 PMFree

  Visit of the castle of Beaumont-sur-Oise

  château de Beaumont-sur-Oise · Beaumont-sur-Oise

  Val-d'Oise

• Sat, September 19 · 3:00 PMFree

  Open days at the Petit Robinson vineyard cellar

  Château de Grouchy · Osny

  Val-d'Oise

• Sun, September 20 · 10:00 AMFree

  From the past to the present: photographic legacy of the Domaine de Montmanoir in renaissance

  Domaine de Montmanoir · Montlignon

  Val-d'Oise

• Sun, September 20 · 10:30 AMFree

  Beaumont across ages, from the Roman gallo in our days

  château de Beaumont-sur-Oise · Beaumont-sur-Oise

  Val-d'Oise

• Sun, September 20 · 2:00 PMFree

  Guided tour of the castle of Arnouville and its park

  château d'Arnouville · Arnouville

  Val-d'Oise

• Sun, September 20 · 3:00 PMFree

  Watercolor workshop with Corinne Poplimont

  Château de Grouchy · Osny

  Val-d'Oise

• Sun, September 20 · 3:00 PMFree

  Theatrical tour "In search of Mrs. Campan"

  château d'Écouen · Écouen

  Val-d'Oise

• Sun, September 20 · 3:30 PMFree

  Investigation in Beaumont

  château de Beaumont-sur-Oise · Beaumont-sur-Oise

  Val-d'Oise

• Sun, September 20 · 4:00 PMFree

  Chapeau Perrault

  Château de Grouchy · Osny

  Val-d'Oise