Belle du Seigneur is a 1968 novel by the Swiss writer Albert Cohen. Set in Geneva in the 1930s, the narrative revolves around a Mediterranean Jew employed by the League of Nations, and his romance with a married Swiss aristocrat. The novel is the standalone third part in a series of four; it follows Solal of the Solals and Nailcruncher, and precedes Les Valeureux. It received the Grand Prix du roman de l'Académie française.