Étienne Gilson (; 13 June 1884 – 19 September 1978) was a French philosopher and historian of philosophy. A scholar of medieval philosophy, he originally specialised in the thought of Descartes, yet also philosophized in the tradition of Thomas Aquinas, although he did not consider himself either a neo-Scholastic or neo-Thomist philosopher. In 1946 he attained the distinction of being elected an "Immortal" (member) of the Académie française.