The Classical era, spanning from 1750 to 1820, saw the rise of sonata form and the symphony. These musical structures became cornerstones of composition, emphasizing clarity, balance, and symmetry. Composers like Mozart, Haydn, and Beethoven shaped the era's sound. Key innovations included the expansion of the orchestra and the development of public concerts. The era's music reflected Enlightenment ideals and societal changes, establishing forms and conventions that would influence composers for generations to come.