Wolfgang Amadeus Mozart was an Austrian composer who lived during the Classical period. He is considered one of the most influential composers of all time. Mozart's music is known for its beauty, complexity, and emotional depth. He composed over 600 works, including symphonies, concertos, chamber music, operas, and choral music. Some of his most famous compositions include his Symphony No. 40, his opera 'The Marriage of Figaro,' and his piano concerto No. 21. Mozart's music continues to be widely performed and admired for its timeless appeal and technical brilliance.