Paul Signac (1863-1935) was a French Neo-Impressionist painter. Together with Georges Seurat, Signac developed the Pointillism style. He was a passionate sailor, bringing back watercolor sketches of ports and nature from his travels, then turning them into large studio canvases with mosaic-like squares of color. He abandoned the short brushstrokes and intuitive dabs of color of the impressionists for a more exact scientific approach to applying dots with the intention to combine and blend not on the canvas, but in the viewer's eye. We have digitally enhanced some of his landscape and seascape public domain sketches and paintings. They are free to download and use under the CC0 license.