A Sunday Afternoon on the Island of La Grande Jatte (French: Un dimanche après-midi à l'Île de la Grande Jatte) was painted from 1884 to 1886 and is Georges Seurat's most famous work. A leading example of pointillist technique, executed on a large canvas, it is a founding work of the neo-impressionist movement. Seurat's composition includes a number of Parisians at a park on the banks of the River Seine. It is held in the collection of the Art Institute of Chicago.
Georges Seurat painted A Sunday Afternoon between May 1884 and March 1885, and from October 1885 to May 1886, focusing meticulously on the landscape of the park and concentrating on issues of colour, light, and form. The painting is approximately 2 by 3 metres (6.6 ft × 9.8 ft) in size. Seurat completed numerous preliminary drawings and oil sketches before completing his masterpiece. One complete painting, the study featured to the right, measures 27 3/4 x 41 in. (70.5 x 104.1 cm) and is on display in the Metropolitan Museum of Art.