Ludwig van Beethoven was a German composer and pianist who served as a crucial figure in the transition between the Classical and Romantic eras in Western music. His work is characterized by its emotional depth and structural innovation. Despite beginning to lose his hearing in his late 20s, he continued to compose, conduct, and perform, even after becoming profoundly deaf. His Ninth Symphony, which includes the 'Ode to Joy' choral finale, was composed when he was completely unable to hear. Beethoven’s influence on subsequent generations of composers was immense; he expanded the scale of the symphony, the sonata, and the string quartet. His life and music are seen as a testament to the triumph of the human spirit over physical adversity and remain central to the core of the classical repertoire.