The document discusses the music of the classical period (1750-1820), highlighting its key characteristics, important forms like sonata and concerto, and styles such as opera seria and opera buffa. It also profiles notable composers such as Franz Joseph Haydn, Wolfgang Amadeus Mozart, and Ludwig van Beethoven, detailing their contributions and historical significance. Additionally, it mentions the connection between classical music and the aristocracy, as well as its evolving accessibility through media.