In February 2010, the Museum de Fundatie in the Dutch city of Zwolle discovered it owned a Van Gogh painting made in 1886, the "Le Blute-fin windmill", authenticated “beyond any doubt” by the Van Gogh Museum in Amsterdam. The museum's founder Dirk Hannema (1895–1984), who bought the anonymous painting from a Parisian art dealer in 1975 for 6,500 francs (less than 1,000 euros), was always convinced it was a Van Gogh and insured it for a sum equivalent to 35,000 euros. However, as managing director of Rotterdam’s Museum Boijmans in 1938, Hannema had purchased a number of paintings that were attributed to Johannes Vermeer, that turned out to be forgeries.