The Nicolas Poussin Museum is housed in an elegant 18th-century bourgeois residence, offering an immersion into the history of Les Andelys, from prehistoric times to the industrial activities of the 20th century. Its diverse collections, covering Fine Arts, decorative arts, archaeology, industrial history, and local history and ethnology, are enriched by a major work by Nicolas Poussin himself, "Coriolan supplicated by his family." This painting recalls the painter's ties to the city, which has dedicated a special room to him adorned with copper plates depicting his famous paintings. Each thematic space in the museum highlights the richness and diversity of the regional heritage.