Beethoven's Moonlight sonata is a classic pice of music and, despite it's length, it is a fairly simple piece to learn. The piano tutorial above will help you learn how to play moonlight sonata on piano. It only covers the first third of the song, but this is more than enough to get to grips with the song. Thankfully, Beethoven's music is far too old to be protected by copyright, so the Moonlight Sonata sheet music is freely available to download. Checkout the free piano sheet music section of this website for a great collection of printable sheets.