In the 1920s Pippin revived his interest in art. In 1930 he painted his first oil, End of the War: Starting Home, a World War I scene. Christian Brinton discovered Pippin's work in 1937 and arranged for a one-man exhibition at the West Chester Community Center. In 1940 Pippin attended classes at the Barnes Foundation in Merion, Pa., the only formal art education he received. That year Albert C. Barnes wrote the introduction to the catalog of the Pippin show held in Philadelphia.