Final answer:
Beethoven wrote a total of nine symphonies, which have had significant influence in both the music world and other art forms such as cinema.
Step-by-step explanation:
Ludwig van Beethoven, a key figure bridging the Classical and Romantic eras in music, wrote nine symphonies. His impactful compositions have continued to resonate through time, influencing not only the music world but extending their presence into other art forms such as cinema.
For instance, Beethoven's Ninth Symphony was notably used by Stanley Kubrick to enhance a dramatic scene in the film A Clockwork Orange. Each of Beethoven's symphonies, from his First, which echoes the classical traditions, to his Ninth, which embodies the expansive and expressive Romantic style, played a significant role in the transition of musical eras.