Mozart is a legend .One of his best and most famous piece of music is The Marriage of Figaro. The Magic Flute and Don Giovanni can be considered a close second and third.
Well, Mozart's most famous PIECES [not just one] are:-Alla Turca [Turkish March]-Eine Kleine Nachtmusik-Figaro's Marriage.And many more.
The marriage of figaro
In my opinion: Rondo Alla Turca, Eine Kleine Nactmusik, 40th Symphony, The Marriage of Figaro and Mozart's Requiem.
I think its the marriage of figaro
My Opinion: Requiem Mass in D minor
His most famous piece is probably his requiem
Twinkle twinkle little star
They are all famous there isn't just one because they are all famous.
All the music the created was famous
All the music that he created
Junk third song