The classical composer BACH is a German composer from the Baroque period, known for his works such as the Brandenburg Concertos and the Mass in B Minor. He was a prolific composer and wrote over 1, 000 works during his lifetime. The classical composer Haydn was an Austrian composer from the Classical period, known for his symphonies, string quartets, and operas. He was a major influence on the development of the Classical style and wrote over 100 symphonies.