Piet Mondrian Dutch, 1872­1944 Diagonal Composition 1921 Oil on canvas 60.1 x 60.1 cm Gift of Edgar Kaufmann, Jr., 1957.307 Courtesy of Mondrian Estate / Holtzman Trust, Essex, Connecticut This abstract, geometric painting by the artist Mondrian may seem far removed from nature, but the artist’s basic vision is rooted in landscape, especially the flat fields of Holland outlined by a network of roads and canals. Mondrian reduced natural forms to their simplest lines and used primary colors. His paintings reveal an exacting attention to the subtle relationships between lines, shapes, and colors.