Russian music has developed over centuries, influenced by many ethnic groups within Russia as well as classical and folk traditions. The 18th century saw the development of Russian opera and classical music under the influence of Italian styles. Important early composers included Mikhail Glinka. In the late 19th century, Tchaikovsky became Russia's most famous composer, known for his ballets. The early 20th century was experimental with composers like Stravinsky, Scriabin, Prokofiev and Shostakovich, some of whom emigrated after the Russian Revolution.