Final answer:
Beethoven composed 9 symphonies throughout his career, some of his most famous symphonies include the 5th Symphony and the 9th Symphony.
Step-by-step explanation:
Beethoven composed 9 symphonies throughout his career.
His symphonies are considered some of the greatest works in classical music and have had a significant impact on the development of the genre.
Some of his most famous symphonies include the 5th Symphony which features the iconic opening motif, and the 9th Symphony which includes the famous choral movement "Ode to Joy".