The Pissarro Museum participates in the new edition of Heritage Days. Housed on the site of a former medieval castle, the museum honors painter Camille Pissarro, who spent 17 years in Pontoise. On Saturday, September 19 and Sunday, September 20, 2026, discover the museum and its gardens, while enjoying a stunning view over the Val-d’Oise. A prime pick for this weekend of culture.