November 6 is the 120th anniversary of the death of Russian composer Pyotr Ilyich Tchaikovsky, who authored some of the world's most popular works of classical music. During his lifetime, Tchaikovsky was widely respected in both Europe and the United States, where he appeared as a guest conductor for the inaugural concert at New York's Carnegie Hall in 1891. His works include operas, ballets, chamber music, and symphonies. Among his best known compositions were "1812 Overture" and his three ballets, "The Nutcracker," "Swan Lake," and "The Sleeping Beauty."