Gesetz zur Wiederherstellung des Berufsbeamtentums
Landsberger was dismissed as a result of the Nazi-era Law for the Restoration of the Professional Civil Service which excluded Jews from government employment. Landsberger accepted a post at the new Turkish University of Ankara, working especially in the area of languages, history and geography. After 1945 he was appointed to the Oriental Institute of the University of Chicago, where he worked until 1955. During this period he became a naturalized American citizen.