13. Daubigny, "Landscape with Harvesters," 1875

When Daubigny painted outdoors, he translated his feeling for nature into an outpouring of spontaneous brushwork. In fact, his commitment to open air painting greatly exceeded that of any other artist before the Impressionists. In this picture, using his favorite extra-wide canvas shape, he depicted the very same wheat fields that Vincent Van Gogh would portray in his famous last paintings, just 15 years later.