Mozart's Symphony No. 40 is a classical masterpiece composed by the legendary Wolfgang Amadeus Mozart in 1788. This symphony is one of Mozart's most popular works and is widely considered to be one of the greatest symphonies ever written
From Wikipedia
Wolfgang Amadeus Mozart was a Classical composer and musician. He completed more than 800 works in his life—including outstanding examples of most of the genres of his time: symphonies, concertos, chamber music, opera, and choral music—and is regarded as one of the greatest composers in the history of Western music.