After studying photography and newspaper illustration, Charles Rosen became interested in painting and studied at the National Academy of Design and the New York School of Art. One of his instructors was William Merritt Chase, a leading American Impressionist. Rosen moved to New Hope and became noted for broadly painted Pennsylvania snow scenes. By 1916, Rosen had determined he was no longer satisfied with his Impressionist style and began to paint in a Cubist-Realist style. He was the most noted of the Pennsylvania School to abandon Impressionism. He died in Woodstock in 1950.