Georges Seurat (born December 2, 1859, Paris, France—died March 29, 1891, Paris) was a painter and known for founding and using a technique that portrays the play of light using tiny brushstrokes of contrasting colours. This became known as Pointillism. Using this technique, he created huge compositions with tiny, detached strokes of pure color too small to be distinguished when looking at the entire work but making his paintings shimmer with brilliance (Brittanica).

https://www.artic.edu/artists/40810/georges-seurat