String Quintet No. 4 (Mozart)

This would not be the last time that a great pair of C major/G minor works of the same form would be published in close proximity and assigned consecutive Köchel numbers.

The central trio, by contrast, is in a bright G major; unusually it is written in a 3-bar rhythm, which it picks up from the final bars of the minuet.

Pyotr Ilyich Tchaikovsky said of this movement: "No one has ever known as well how to interpret so exquisitely in music the sense of resigned and inconsolable sorrow."

The start of the fourth movement is not the typical quick-tempo finale, but a slow aria back in the home key of G minor.

At this point, Mozart launches into the ebullient G major Allegro, which creates a stark contrast between it and the movements that preceded it.