The document provides biographical information on three classical period composers: Franz Joseph Haydn, Wolfgang Amadeus Mozart, and Ludwig van Beethoven. It notes that Haydn was known as the "Father of Symphony" and composed famous works like the "Surprise Symphony." Mozart was a child prodigy who wrote operas and symphonies from a young age but died poor at age 35. Beethoven began performing at a young age, trained under his father and Gottlob Neefe, and eventually went deaf but was recognized as the "Composer of the Millennium."