What art movement does Henri Rousseau belong to?

Henri Rousseau is often associated with the Naïve Art movement, characterized by its childlike simplicity and a lack of formal training in traditional artistic techniques. His works feature vivid colors, imaginative landscapes, and dreamlike scenes, which set him apart from the mainstream art movements of his time. Rousseau's style embodies a sense of innocence and a unique perspective on reality, making him a significant figure in the realm of outsider art.