Fugue no. 10 en Mi Mineur, BWV.879

Prelude and Fugue in E minor, BWV 879, is the tenth piece in the second book of The Well-Tempered Clavier by Johann Sebastian Bach, compiled between 1739 and 1744.

The prelude, written in the style of an invention, features a courante-like motion with interweaving patterns between the hands. The three-voice fugue contains an unusually long subject and varied rhythmic elements, and is structurally elaborate. Despite its apparent simplicity and lack of ornamentation, it is among the less frequently regarded fugues in the collection.