Hans Ludwig Cohn Jaffe was born as the son of Jewish parents. He married Elly Jaffe Freem on August 16, 1947 in Lucerne. After his graduation at the Goethe-Gymnasium in January 1933 moved Hans Jaffe in connection with the seizure of power by Adolf Hitler in Germany, to Amsterdam. Here he studied art history and after his bachelor's degree assistant Johan Quirijn of Regteren Altena, curator at the Municipal Museum of Amsterdam. In 1936 his first catalog was created, titled Two centuries of British Art. After completing his studies in 1938 he started his journalistic career at The Green Amsterdam. Jaffe also taught several years of art history at the Art School in New Amsterdam, a school that worked according to the methods of the German Bauhaus. From 1940 to 1942 Jaffe did resistance work. In 1942 he fled to England via France and Switzerland. In 1945 he was commissioned to identify. Dutch art From 1947 to 1961, Jaffe attached to the Stedelijk Museum Amsterdam, first as curator and later as Deputy Director. After obtaining his PhD in 1956 on De Stijl in 1958 he was a private tutor at the University Of Amsterdam. From 1963 to 1976 he was director of the Jewish Historical Museum in Amsterdam.