Wolfgang Amadeus Mozart (January 27, 1756 – December 5, 1791) was a composer of classical music on Earth. Considered one of the finest composers on Earth, Mozart composed over 600 works - including symphonies, concertos, chamber, piano, operas, and choral music. Mozart was one of the most popular composers on Earth, and as humanity moved out into the interstellar community his works became popular amongst other races as well.
In 2258, in the Kelvin timeline, Captain Christopher Pike mentally played back the final movement of Mozart's Jupiter Symphony while being tortured by Nero. (TOS novelization: Star Trek) The Vulcan Sarek considered Mozart to be one of his favorite composers. Spock once informed Nyota Uhura of this fact. (TOS novel: Probe) Just before Sarek's final mission for the United Federation of Planets, the crew of the USS Enterprise (NCC-1701-D) held a Mozart concert for Sarek. Lieutenant Commander Data was the featured soloist at this concert. When a particlar movement drove Sarek to tears, the Enterprise crew began to suspect something was very wrong with Sarek, and later confirmed that he had Bendii syndrome. (TNG episode: "Sarek")