Bach-Werke-Verzeichnis (BWV): catalogue of Johann Sebastian Bach's works

Compilation and purpose

The catalogue was compiled and published by Wolfgang Schmieder in 1950. Schmieder collected titles, manuscript sources and known attributions from earlier inventories and archival material, then organized the material to make it readily usable. His numbering system is intended primarily as a practical, genre-based index: it groups related works together and facilitates scholarly citation and the preparation of scores and recordings. Schmieder preferred the composer-centred initialism BWV rather than an abbreviation derived from his own name.

Organization and numbering

BWV numbers are not chronological. Instead, Schmieder arranged works by category so that such repertories as sacred and secular vocal music, organ works, keyboard works, chamber pieces and orchestral music appear in contiguous sections. This means that pieces written at very different times may appear near one another because of shared genre or function. The system helps to distinguish works with similar or identical titles: for example a particular Prelude and Fugue in a given key is identified by its BWV number, which removes ambiguity when several such pieces exist.

• Vocal music: cantatas, masses, passions and motets are grouped together and form a considerable portion of Bach's output.
• Instrumental music: keyboard and organ works, chamber pieces and suites are arranged by type.
• Orchestral works: concertos and orchestral suites are collected in their own section.

Anhang: doubtful, spurious and lost works

Schmieder included an appendix, traditionally called the BWV Anhang, to list items whose authorship or survival status was uncertain. The Anhang records works once attributed to Bach but later shown to be by other hands, pieces known only from references or descriptions and compositions that are lost but historically documented. As scholarship progresses, works may be transferred between the main catalogue and the Anhang when new manuscript evidence or stylistic analysis clarifies attribution.

Examples and practical use

Well-known works are commonly cited by BWV number: for instance the large-scale Mass in B minor is identified as BWV 232. Users should remember that the BWV is a categorical, not a chronological, listing. To explore Bach's vocal output one might consult lists and editions grouped under cantatas, while those interested in orchestral repertoire will look among the concertos and suites.

Reception and later revisions

Since its first publication the BWV has remained the standard reference for Bach's works. Later editions, annotated lists and scholarly catalogues have supplemented Schmieder's work as new sources have been discovered and attributions reassessed. Because musicological evidence can change, modern editions and databases often note variant attributions, editorial decisions and the status of works in the Anhang, allowing users to trace how our understanding of Bach's oeuvre has developed over time.