Painting an Afternoon with Hundreds of Thousands of Dots

In A Sunday Afternoon on the Island of La Grande Jatte, the crowd at leisure by the Seine is all "arranged," dot by dot, from countless points of pure color. Seurat spent two years and hundreds of thousands of dots to finish it. He turned painting into a precise experiment in optics and color — from afar a serene afternoon, up close a dense, quivering swarm of colored molecules.