One of the well-known pieces from the "Preludes" is Prelude No. 15, in D-flat major and nicknamed "Raindrop". This nickname refers to the monotonous repetition of one note in the accompaniment. It reminded early music lovers of the dripping of raindrops. Another well-known number is Prelude No. 4, in E minor, with its melancholy descending chords in the accompaniment.