Breaking free of the naturalism of Impressionism in the late 1880s, a group of young painters sought independent artistic styles for expressing emotions rather than simply optical impressions, concentrating on themes of deeper symbolism. Through the use of simplified colors and definitive forms, their art was characterized by a renewed aesthetic sense as well as abstract tendencies. Among the nascent generation of artists responding to Impressionism, Paul Gauguin (1848–1903), Georges Seurat (1859–1891), Vincent van Gogh (1853–1890), and the eldest of the group, Paul Cézanne (1839–1906), followed diverse stylistic paths in search of authentic intellectual and artistic achievements. These artists, often working independently, are today called Post-Impressionists. Although they did not view themselves as part of a collective movement at the time, Roger Fry (1866–1934), critic and artist, broadly categorized them as "Post-Impressionists," a term that he coined in his seminal exhibition Manet and the Post-Impressionists installed at the Grafton Galleries in London in 1910.