No, you’re not seeing things. Yes, that’s a real windmill smack dab in the middle of Montmartre. An archaic holdover from when mills were functional rather than decorative. Built in 1622 and operating to grind flour until the 19th century, the Moulin de la Galette has been painted by such neighborhood locals as Renoir, Toulouse-Lautrec, van Gogh, Utrillo and Picasso. Over its history, the building has been an open-air café, a music hall, television studios and a restaurant. It is now in private hands.