The Orgelbüchlein contains 46 chorale preludes, and a fragment (BWV Anh.
Johann Kirnberger's involvement with this collection of chorale preludes, some of which are spurious or doubtful, is however uncertain: modern scholarship no longer refers to this set as "Kirnberger Collection" (unless with qualifiers such as "so-called" or "formerly").
31 chorale preludes for organ, discovered 1985 in the archives of the Yale University library.
Provenance of standard texts and tunes, such as Lutheran hymns and their chorale melodies, Latin liturgical texts (e.g. Magnificat) and common tunes (e.g. Folia), are not usually indicated in this column.
Various lost, doubtful and spurious organ works are included in the BWV Anhang: