Georges Seurat

Georges Pierre Seurat was a French post-Impressionist artist. He devised the painting techniques known as chromoluminarism and pointillism and used conté crayon for drawings on paper with a rough surface.

Seurat's artistic personality combined qualities that are usually thought of as opposed and incompatible: on the one hand, his extreme and delicate sensibility, on the other, a passion for logical abstraction and an almost mathematical precision of mind. His large-scale work A Sunday Afternoon on the Island of La Grande Jatte altered the direction of modern art by initiating Neo-Impressionism, and is one of the icons of late 19th-century painting.

Source: Wikipedia