Rachmaninoff became happier. He was allowed to marry Natalia after years of engagement during which the Russian Orthodox Church did not want them to be married. The political conditions in Russia were bad so he lived in Germany and Italy for a time. After the Russian Revolution of 1917 he left his country and never returned. He had been very successful with his "Third Piano Concerto" in the United States, so he went to live in the United States in 1918. Russia had become the Soviet Union and for many years Rachmaninoff’s music was not allowed to be performed there. This worried him a lot and he felt homesick. He did not write very much music during the rest of his life in the United States. One work that did become very popular was the "Rhapsody on a Theme of Paganini" which he wrote in Switzerland in 1934. He died of melanoma in Beverly Hills, California.