24 Preludes and Fugues, BWV 870-893 ; Praeludium 1 in C, BWV 870/1 ; Fuga 1 a 3 in C, BWV 870/2 ; Praeludium 2 in c minor, BWV 871/1 ; Fuga 2 a 4 in c minor, BWV 871/2 ; Praeludium 3 in C sharp, BWV 872/1 ; Fuga 3 a 3 in C sharp, BWV 872/2 ; Praeludium 4 in c sharp minor, BWV 873/1 ; Fuga 4 a 3 in c sharp minor, BWV 873/2 ; Praeludium 5 in D, BWV 874/1 ; Fuga 5 a 4 in D, BWV 874/2 ; Praeludium 6 in d minor, BWV 875/1 ; Fuga 6 a 3 in d minor, BWV 875/2 ; Praeludium 7 in Eb, BWV 876/1 ; Fuga 7 a 4 in Eb, BWV 876/2 ; Praeludium 8 in d sharp minor, BWV 877/1 ; Fuga 8 a 4 in d sharp minor, BWV 877/2 ; Praeludium 9 in E, BWV 878/1 ; Fuga 9 a 4 in E, BWV 878/2 ; Praeludium 10 in e minor, BWV 879/1 ; Fuga 10 a 3 in e minor, BWV 879/2 ; Praeludium 11 in F, BWV 880/1 ; Fuga 11 in F, BWV 880/2 ; Praeludium 12 in f minor, BWV 881/1 ; Fuga 12 a 3 in f minor, BWV 881/2 ; Praeludium 13 in F sharp, BWV 882/1 ; Fuga 13 a 3 in F sharp, BWV 882/2 ; Praeludium 14 in f sharp minor, BWV 883/1 ; Fuga 14 a 3 in f sharp minor, BWV 883/2 ; Praeludium 15 in G, BWV 884/1 ; Fuga 15 a 3