The Well-Tempered Clavier, BWV 846–893, is a collection of two series of Preludes and Fugues in all 24 major and minor keys, composed for solo keyboard by Johann Sebastian Bach. In the German of Bach's time Clavier (keyboard) was a generic name indicating a variety of keyboard instruments, most typically a harpsichord or clavichord – but not excluding an organ either.
| Date of composition | 1722 |
| First published | 1801 |
| Type | Preludes and Fugues |
| Tonality | D Major |
| Catalogue | BWV 850a |
| Arrangement of | Johann Sebastian Bach: Prelude and Fugue in D major, BWV 850 |
| Instruments | Clavichord |
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| Autotranslations beta |
Jean-Sébastien Bach: Prelude and Fugue en ré majeur, BWV 850a Johann Sebastian Bach: Prelude and Fugue in re maggiore, BWV 850a Johann Sebastian Bach: Prelude and Fugue D-dur, BWV 850a |