Renoir painted two nearly identical versions of Le Moulin de la Galette. The first was bought by Caillebotte and was left to the State upon his death. The second was acquired by the American collector John Hay Whitney and put up for sale 1990 at an auction in New York. It fetched 406 million French francs making Renoir the most expensive French painter in the world.
Sources
Arts, Lettres & Techniques :
http://www.arts-lettres-et-techniques.tm.fr/
Art Through the Ages. University of Michigan: Harcourt Brace Jovanovich.
1991.
Justus, Kevin. "Art and Culture II." Tucson , Arizona.
1992. (Lecture presented at Pima Community College.)
De La Croix, Horst, Richard D. Tansey, and Diane Kirkpatrick.
WebMuseum,Paris:
http://www.ibiblio.org/wm/paint/auth/renoir/moulin-galette/
This and other works by Renoir may be seen atOlga's Gallery:
http://www.abcgallery.com/R/renoir/renoir.html