Joseph Haydn was a famous composer known for his contributions to classical music during the Classic era. Often dubbed the "father of the symphony," Haydn's innovative structure and thematic development set the stage for future composers like Mozart and Beethoven. His prolific output includes over 100 symphonies, string quartets, and choral works, with pieces such as "The Creation" and "The Seasons" showcasing his mastery of melody and harmony. Haydn's music is characterized by wit, grace, and balance, making significant contributions to the evolution of sonata form and chamber music. His enduring influence is still felt in the classical music world today.