Charles Gagnon (1934–2003) was a painter, photographer and filmmaker considered by many to be an important figure in Quebec and Canadian art in the 20th century.

His early career emerged alongside the American Abstract Expressionists and his growing multidisciplinary practice broke away from the singularity of painting shared by his Montreal contemporaries of the Automatistes and the Plasticiens. The complexity and depth of his work as a painter, photographer, and filmmaker was distinguished by a probing, introspective quality. His paintings were simultaneously rigid and free-flowing, with self-imposed rules and structure contrasted by rich fracture and gestural brush work. Across all disciplines he played with multiple levels of perception, and many works evoke the liminal space of the threshold, or multi-plane spaces.