This document discusses music of the Classical period from 1750-1820. It focuses on the works of Franz Joseph Haydn, Wolfgang Amadeus Mozart, and Ludwig van Beethoven. It provides information on musical forms that were popular during this period, including sonatas, concertos, and symphonies. It also discusses characteristics of Classical period music like dynamics, articulation, rhythm, and ornamentation. Additionally, it covers Classical opera forms like opera seria and opera buffa. The document aims to teach students about important composers and genres of music from the Classical period.