Prelude and Fugue in C-sharp minor, BWV 873

Prelude and Fugue in C-sharp minor, BWV 873, is a keyboard composition written by Johann Sebastian Bach in 1738.^[1] It is the 4th prelude and fugue in Book II of The Well-Tempered Clavier.

Incipit of prelude

Incipit of fugue

Prelude

The prelude is in the time signature of 9/8 time. It is in the key of C-sharp minor. The Prelude is heavily ornamented with mordents and appoggiaturas.^[2]

Fugue

The fugue is in 12/16 time. It is also in C-sharp minor. Unlike its prelude, the fugue does not have much ornamentation.^[3]