French writer and existentialist philosopher, he was also the leading proponent of Existentialism. He refused the Nobel Prize for Literature in 1964.Fountain pen signature and inscription, “To Lionel Aucoin, J. P. S., Paris, J. P Sartre,” on an off-white 5.25 x 8.5 sheet of his Les Temps Modernes letterhead, dated June 26, 1956. Nicely cloth matted and framed by the Gallery of History, with a photo of Sartre, a biographical plaque and a transcript plaque, to an overall size of 28 x 22. In fine condition. R&R COA. Oversized.