A piece that is undoubtedly one of the most recognizable and loved piano pieces of all times, the Moonlight Sonata--as we usually refer to it--wasn't titled that by Beethoven. The first edition of the piece was titled, Sonata quasi una fantasia which translates to, "sonata in the manner of a fantasy" or even "sonata played as if improvised." The "moonlight" name came from the German music critic, Ludwig Rellstab who described the first movement as moonlight shining on Lake Lucerne. The moonlight description stuck, and today it is thought of as the Moonlight Sonata.
Daniel Barenbaum performs this piece beautifully and expressively and the "fire" in the third music is very exciting.