Post-Impressionism was a predominantly French art movement that developed roughly between 1886 and 1905, from the last Impressionist exhibition to the birth of Fauvism. Post-Impressionism emerged as a reaction against Impressionists' concern for the naturalistic depiction of light and color. Post-Impressionists extended Impressionism while rejecting its limitations: they continued using vivid colors, sometimes using thick application of paint and painting from life, but were more inclined to emphasize geometric forms, distort form for expressive effect, and use unnatural or modified color. The movement's principal artists were Paul Cézanne, Paul Gauguin, Vincent van Gogh and Georges Seurat.