 Paris has traditionally been associated with alternative, artistic or intellectual subcultures, many of which involved foreigners.Such subcultures include the "Bohemians" of the mid-nineteenth century, the Impressionists, artistic circles of the Belle époque (around such artists as Picasso and Alfred Jarry), the Dadaists, Surrealists, the "Lost Generation" (Hemingway, Gertrude Stein) and the post-war "intellectuals" associated with Montparnasse (Jean-Paul Sartre, Simone de Beauvoir).France has an estimated 280,000-340,000 Roma, generally known as "Gitans", "Tsiganes", "Romanichels" (slightly pejorative), "Bohémiens", or "Gens du voyage" ("travellers").