More free lessons at: http://www.khanacademy.org/video?v=wNB9Vm6MoDQ
Georges Seurat, A Sunday on La Grande Jatte - 1884, 1884-86, oil on canvas, 81-3/4 x 121-1/4 inches / 207.5 x 308.1 cm (The Art Institute of Chicago).

View this work up close on the Google Art Project: http://www.googleartproject.com/collection/the-art-institute-of-chicago/...