Wolfgang Amadeus Mozart, one of the world's best-known composers, began playing music at a very early age and became a professional musician when he was only 17. He went on to compose hundreds of pieces of music—many of which are among the most famous in musical history—and influence composer Ludwig van Beethoven. More than 200 years after his death, Mozart's music is still among the most respected and beloved in the world. Learn the story of one of the most important composers of all time in Wolfgang Amadeus Mozart: World-Famous Composer.