Georges Seurat was a French artist who is best known for his pointillist painting style. He was born in 1859 and died in 1891, and is considered to be one of the most influential Post-Impressionist painters. Seurat's most famous work is A Sunday Afternoon on the Island of La Grande Jatte, which was completed in 1886. He is also known for his use of color theory and optical effects in his paintings.