 After the death of Heinrich in 1935 and the formal closing of the Galleries in 1937, Thannhauser and his family left for Paris.In 1940, they moved to New York, where Justin, together with his second wife, Hilde (1919–91), established himself as an art dealer.The Thannhausers’ support of artistic progress, and their advancement of the early careers of artists like Kandinsky, Franz Marc, and Paul Klee, paralleled the vision of the Solomon R. Guggenheim Museum’s founder, Solomon R. Guggenheim (1861–1949).