Henri Rousseau (1844–1910), nicknamed "Le Douanier" (the customs officer), was a French painter known for imaginative compositions. Self-taught, he drew inspiration from nature and stories, blending realism with dreamlike qualities. Iconic works like "The Sleeping Gypsy" and "The Dream" showcased his ability to create enchanting realms. Despite criticism, Rousseau's unconventional style gained recognition among avant-garde artists, inspiring imagination and artistic expression's limitless possibilities.