Georges-Pierre Seurat was a French post-Impressionist artist who developed the painting techniques known as chromoluminarism and pointillism. His most famous masterpiece, 'A Sunday Afternoon on the Island of La Grande Jatte,' altered the course of modern art and is a prime example of his unique style. Seurat's scientific approach to color and light was both revolutionary and highly influential, setting him apart from his Impressionist contemporaries. His tragically short career, ending at the age of 31, left behind a legacy that inspired Neo-Impressionism and subsequent artistic movements.