| BWV 870-893 - Well-Tempered Clavier: Book II (24 Preludes and Fugues)
No.1 in C, 2 in c minor, 3 in C#, 4 in c# minor, 5 in D, 6 in d minor, 7 in E-flat, 8 in e-flat minor… [and so on, through all keys]. | Written between 1738 & 1742. |
| BWV 870a - [another version of BWV 870] in C | . |
| BWV 870b - [another version of BWV 870] in C | . |
| BWV 872a - [another version of BWV 872] in C# | . |
| BWV 875a - [another version of BWV 875] in d minor | . |