Alexander Konstantinovich Glazunov (10 August 1865 – 21 March 1936) was a prominent Russian composer, conductor, and music teacher of the late Romantic period. Born in Saint Petersburg, Glazunov demonstrated prodigious musical talent from a young age, beginning piano lessons at nine and composing by eleven. His early potential was recognized by Mily Balakirev, who introduced him to Nikolai Rimsky-Korsakov, under whom Glazunov studied privately. By the age of 16, Glazunov's First Symphony premiered, garnering praise from notable figures such as Borodin and Stasov.

Glazunov became associated with the influential music publisher Mitrofan Belyayev, who supported his career and helped him gain international acclaim. His works, which include symphonies, ballets, and concertos, were characterized by a blend of Russian nationalism and European influences, drawing from composers like Tchaikovsky and Wagner. Notable compositions from his peak creative period in the 1890s include the fourth, fifth, and sixth symphonies, as well as ballets like "Raymonda."

In 1905, Glazunov was appointed director of the Saint Petersburg Conservatory, a position he held until 1930. During his tenure, he played a crucial role in reorganizing the institution following the Bolshevik Revolution and taught notable students, including Dmitri Shostakovich. Despite his conservative musical style being viewed as old-fashioned by younger composers, Glazunov maintained a respected reputation.

After leaving the Soviet Union in 1928, Glazunov settled in Paris, citing health reasons, though it is believed he was also escaping the political climate. He continued to compose, with later works such as the Concerto for Alto Saxophone (1934) reflecting his matured style. Glazunov passed away in Neuilly-sur-Seine, France, in 1936, leaving behind a legacy of over 100 compositions that continue to be celebrated for their craftsmanship and contribution to Russian music. His remains were moved to Leningrad in 1972.