Prelude in C Minor, BWV 999, also termed The "Little" Prelude in C Minor, is a piece written by Johann Sebastian Bach sometime between 1717 and 1723. Though originally composed for Lute-Harpsichord, it has since been adapted for various instruments, including lute, piano and guitar. It is a pedagogical work much in the spirit of The Well-Tempered Clavier, with which it shares musical characteristics. The piece's true authorship fell into question for decades before being proven to be Bach's by publication of Hans Neemann’s J. S. Bach Lautenkompositionen (1931).

Date of composition 1725 (unsure)
First published 1843
Type Prelude
Tonality C Minor
Catalogue BWV 999
Instruments Lute
Autotranslations beta Jean-Sébastien Bach: Prélude en do mineur, BWV 999
Johann Sebastian Bach: Preludio in do minore, BWV 999
Johann Sebastian Bach: Präludium c-moll, BWV 999