A napkin-size Renoir painting bought for $7 at a flea market but valued at up to $100,000 must be returned to the museum it was stolen from in 1951, a federal judge ordered on Friday. The 1879 Impressionist painting "Paysage Bords de Seine," dashed off for his mistress by Pierre-Auguste Renoir at a riverside restaurant, has been at the center of a legal tug-of-war between Marcia "Martha" Fuqua, a former physical education teacher from Lovettsville, Virginia, and the Baltimore Museum of Art in Maryland. Judge Leonie Brinkema, in a hearing in the U.S. District Court for the Eastern District of Virginia, dismissed Fuqua's claim of ownership, noting that a property title cannot be transferred if it resulted from a theft. "The museum has put forth an extensive amount of documentary evidence that the painting was stolen," Brinkema said, citing a 1951 police report and museum records. "All the evidence is on the Baltimore museum's side. You sti