Portraits of United States Presidents, painted in the pointillism style, will be exhibited on a rotating basis.  Pointillism is a way of painting in which small, distinct dots of color are applied in patterns to form an image. The artist paints the picture with hundreds of tiny dots. The technique was developed in 1886 by Georges Seurat and Paul Signac. The movement begun with this technique is known as Neo-impressionism. Other well-known early artists using this technique included Camille Pissarro and Vincent Van Gogh.