Mikhail Glinka (1804-1857) was the first major composer of classical music in Russia. He composed two important early Russian operas, Ivan Susanin and Ruslan and Lyudmila. Glinka's operas incorporated Russian folk music elements and helped establish a national style of classical music in Russia. His works were influential in the development of later Russian composers in the 19th century such as Tchaikovsky and Rimsky-Korsakov.