Ludwig van Beethoven
Ludwig van Beethoven was a German composer of classical music in the 18th and 19th century.
Among his works is his Symphony Number Nine. In 2368 Data listened to the piece in order to analyze its aesthetics. (TNG: "A Matter of Time")
In 2375 the Computer offers to the request of Captain Picard for some music, Beethoven´s piano sonata Op. 27 #2 (Moonlight Sonata). (Star Trek: "Insurrection")
After Jonathan Archer restored a damaged timeline, Ludwig van Beethoven playing the piano could be seen in the time stream as the timeline realigned itself. (ENT: "Storm Front, Part II")