Johann van Beethoven, more commonly known as Ludwig van Beethoven, was a pivotal German composer and pianist who lived from 1770 to 1827. He is widely regarded as one of the most influential figures in Western classical music, bridging the Classical and Romantic eras. Beethoven's genre primarily encompassed classical music, but his innovative approaches laid the groundwork for Romanticism. Notable works include his nine symphonies, particularly the Fifth and Ninth, which features the iconic "Ode to Joy." His piano sonatas, such as the "Moonlight Sonata" and "Appassionata," as well as quartets like the late String Quartets, showcase his mastery of form and emotional depth. Beethoven's impact on music is profound; he expanded the scope and scale of symphonic and chamber music, introduced new structural innovations, and infused his compositions with personal expression and individuality. His struggles with deafness, which began in his late 20s, only intensified the emotional power of his music. Beethoven's work paved the way for later composers, influencing the direction of classical music and establishing a legacy that continues to resonate with audiences today.