Fauvism as a style began around 1900 and continued beyond 1910. The movement as such lasted only a few years, 1904–1908, and had three exhibitions.[19][20] The leaders of the movement were Matisse and André Derain.[19] Matisse's first solo exhibition was at Ambroise Vollard's gallery in 1904,[16] without much success. His fondness for bright and expressive colour became more pronounced after he spent the summer of 1904 painting in St. Tropez with the neo-Impressionists Signac and Henri-Edmond Cross.[15] In that year he painted the most important of his works in the neo-Impressionist style, Luxe, Calme et Volupté.[15] In 1905 he travelled southwards again to work with André Derain at Collioure. His paintings of this period are characterised by flat shapes and controlled lines, using pointillism in a less rigorous way than before.