There is some doubt among scholars as to whether Toccata and Fugue in D minor is in fact written by J.S Bach. There is even some debate over whether the piece was originally written for organ.

Many who believe that it is not a J.S Bach composition cite the fact that the piece is not autographed as almost all others by Bach were and that it was copied originally by a sketchy student of Bach's who had a reputation for passing off works that were not by Bach as ones that were. Some scholars also believe that the piece is too raw and unrefined to be the work of Bach, particularly the dissonant arpeggio after the main theme.