A Sunday on La Grande Jatte is Georges Seurat’s masterpiece. The mural-sized painting depicts boaters and sunbathers at a riverfront park in Paris. Seurat worked on it methodically for two years, nearly completing it once using small, horizontal brushstrokes. But he decided to repaint much of it with smaller dots of color as he refined his pointillist technique. When Seurat first exhibited the painting in 1886, many art critics mocked its unusual style. Only a few people recognized that the work would be revolutionary.