She later joined the Lutheran church. The couple had six children. Pre-war and Second World War period In 1912, he and his wife moved to a sanatorium in Davos, Switzerland, which was to inspire his 1924 novel The Magic Mountain. He was also appalled by the risk of international confrontation between Germany and France, following the Agadir Crisis in Morocco, and later by the outbreak of the First World War. In 1929, Mann had a cottage built in the fishing village of Nidden, Memel Territory (now Nida, Lithuania) on the Curonian Spit, where there was a German art colony and where he spent the summers of 1930–1932 working on Joseph and His Brothers. Today, the cottage is a cultural center dedicated to him, with a small memorial exhibition. In 1933, while travelling in the South of France living in Sanary-sur-Mer, Mann heard from his eldest children, Klaus and Erika in Munich, that it would not be safe for him to return to Germany. The family (except these two children) emigrated to Küsnacht, near Zürich, Switzerland, but received Czechoslovak citizenship and a passport in 1936. In 1939, following the German occupation of Czechoslovakia, Mann emigrated to the United States. He moved to Princeton, New Jersey, where he lived on 65 Stockton Street and began to teach at Princeton University. In 1942, the Mann family moved to 1550 San Remo Drive in the Pacific Palisades neighborhood of Los Angeles, California. The Manns were prominent members of the German expatriate community of Los Angeles, and would frequently meet other emigres at the house of Salka and Bertold Viertel in Santa Monica, and at the Villa Aurora, the home of fellow German exile Lion Feuchtwanger. On 23 June 1944, Thomas Mann was naturalized as a citizen of the United States. The Manns lived in Los Angeles until 1952. Anti-Nazi broadcasts The outbreak of World War II, on 1 September 1939, prompted Mann to offer anti-Nazi speeches (in German) to the German people via the BBC. In October 1940, he began monthly broadcasts, recorded in the U.S. and flown to London, where the BBC broadcast them to Germany on the longwave band. In these eight-minute addresses, Mann condemned Hitler and his "paladins" as crude philistines completely out of touch with European culture. In one noted speech, he said: "The war is horrible, but it has the advantage of keeping Hitler from making speeches about culture."