After the war, Kahn spent several long periods in Europe between 1948 and 1950, among other places in Ascona, but when it seemed unlikely he would soon be able to return there permanently, he once more settled in New York. He had a house in Atlantic Beach, Long Island and a studio in Manhattan. After his wife left him, he lived with Ellen Fussing, a Danish-American colleague, with whom he finally returned to Europe. Until 1960 they lived primarily in Switzerland, among other places in Lugano. In 1960, on vacation in Agadir, he survived a serious earthquake unharmed—in a sarcophagus. He was evacuated to Denmark with Fussing, settled in North Zealand, and in 1962 opened a studio in Copenhagen.Kahn traveled to Ascona in fall 1967 for health reasons; on 14 January 1968, he died in a clinic in Locarno.