  During his years in Zürich Weyl received, and turned down,  numerous offers of professorships by other  universities—including an invitation in 1923 to become Felix  Klein’s successor at Göttingen. It was only in 1930 that he  finally accepted the call to become Hilbert’s successor there. His  second stay in Göttingen was to be brief. Repelled by Nazism,  “deeply revolted,” as he later wrote, “by the  shame which this regime had brought to the German name,” he  left Germany in 1933 to accept an offer of permanent membership of  the newly founded Institute for Advanced Study in Princeton. Before  his departure for Princeton he published The Open World  (1932); his tenure there saw the publication of Mind and  Nature (1934), the aforementioned The Classical Groups  (1939), Algebraic Theory of Numbers (1940), Meromorphic  Functions and Analytic Curves (1943), Philosophy of  Mathematics and Natural Science (1949; an enlarged English  version of a 1927 work Philosophie der Mathematik und  Naturwissenschaften), and Symmetry (1952). In 1951 he  formally retired from the Institute, remaining as an emeritus member  until his death, spending half his time there and half in  Zürich. He died in Zürich suddenly, of a heart attack, on 9 December 1955.