Prelude in G minor, Op. 23, No. 5, is a music piece by Sergei Rachmaninoff, completed in 1901. It was included in his Opus 23 set of ten preludes, despite having been written two years earlier than the other nine. Rachmaninoff himself premiered the piece in Moscow on February 10, 1903, along with Preludes No. 1 and 2 from Op. 23.
The Prelude’s taut structure is in ternary form, consisting of an opening “A” section with punctuated sixteenth-note chords (marked Alla marcia), a more lyrical and melancholy “B” section with sweeping arpeggios in the left hand (marked Poco meno mosso), a transition into the original tempo, and a recapitulation of the initial march.