German Kurt Harald Isenstein was a Jew who made an apprenticeship as a stone-sculptor. Subsequently, he studied at the Art Academy in Berlin and became a freelance sculptor. His bust of Albert Einstein (1928) in front of the Einstein Tower in Potsdam was removed and hidden by the Nazis in 1933. Isenstein was arrested, but was allowed to immigrate to Denmark in 1934 (his mother was Danish), and in 1943 to Sweden. After World War II, he returned to Denmark and founded an Arts and Crafts School in København (Copenhagen). He eventually adopted Danish citizenship. Isenstein created numerous busts and illustrated books, and also worked as an art and music teacher. Since his artistic interest was mainly directed towards the human body in sporting action, he designed bronze sculptures and numerous sports medals and badges.