Pointillism is a painting technique that uses small dots of pure color placed close together to compose the overall image, developed by Georges Seurat and Paul Signac in the 1880s as an offshoot of Impressionism. Some key pointillist works include Seurat's Sunday on the Island of La Grande Jatte from 1884 and Signac's Sunday from 1888-1890, both composed entirely of tiny colored dots.