Henri Rousseau retired at 49 to paint full-time, and his ambition paid off. This rare retrospective reunites nearly 50 works from the Barnes Foundation and Musée de l'Orangerie, including "The Sleeping Gypsy" on loan from MoMA, revealing a methodical artist beyond his "naïve" reputation. Interactive displays showcase scientific analyses of his techniques, offering fresh insight into how this self-taught visionary conquered the Paris art scene.