Symphony No. 9 in D Minor — Ludwig van Beethoven

Beethoven's 1824 Symphony No. 9 remains the most revolutionary symphonic achievement, introducing choral voices to the form with its 'Ode to Joy' finale—a universal hymn completed while he was nearly deaf. This 70-minute masterpiece integrates soloists and chorus into the final movement, a bold innovation that outperforms #4 in scope and emotional breadth. It sold over 1.5 million copies in its first century of recordings, solidifying its status as a transcendent work. Its climactic theme, performed at pivotal global events, rivals Beethoven's own Fifth Symphony in cultural ubiquity but surpasses it in sheer visionary impact.