Original Title: Fantasia sopra il Chorale “Wo Gott, der Herr, nicht bey uns hält” pro Organo à 2 Clav. e Pedale dal Sig. J. S. Bach. “Nach einer sehr correcten alten Handschrift auf der Kgl. Bibliothek zu Königsberg.”

The piece is attributed to Johann Sebastian Bach. But many details are not typical to with Bach’s the technique of composition. Some structures and melodies can we find in “Nun komm der Heiden Heiland” of Nicolaus Brunhs; perhaps is this a composition of Nicolaus Bruhns.

Organ (1772, Allbertus Antoni Hinsz), Reformed Church, Midwolda (NL)