As one of the most widely-respected German writers of the twentieth century, ThomasMann (1875-1955) was a key figure in supporting and communicating the idea of a free and democratic Germany during a period of enormous international tension and conflict. While a professor of literature at Princeton (1938-41) and a resident of Los Angeles (1941-52), he became a highly active participant in the war effort, giving anti-fascist speeches around the country and recording a series of broadcasts to Germany on the BBC, calling for an end to National Socialism. He and his wife Katia became America citizens in 1944, and three of their children served in American uniform. This paper focuses on Mann's position as an "unofficial diplomat" in 1949while receiving the Goethe Prize, then themost prestigious literary prize in Germany, from two different locations: Frankfurt am Main in western Germany and Weimar in eastern Germany. This situation thus placed Mann in the unique position of being able to address the citizens of two diverging states who were at the heart of Cold War Europe: the two Germanies, and to emphasize what they held in common. During the postwar era, Mann's political position shifted from one who spoke mainly about a democratic Germany to one who was a strong proponent for international peace and cooperation. Nonetheless, some Western journalists depicted him as a dupe for communism, and the FBI increasingly tracked his movements. This paper thus discusses both the opportunities and challenges for international relations by a major cultural figure and one of the leading " unofficial diplomats" during the onset of the Cold War.