A towering figure in Russian music and one of the most popular composers in history, Tchaikovsky became interested in music as a child and turned to serious composition at 14. His works are noted for their expressive melodies, and he is said to have revolutionized ballet by transforming it from a grand decorative gesture into a staged musical drama. His ballets include Swan Lake and The Nutcracker. What Russian businesswoman supported him for 13 years but—as a rule—never met him? Discuss