[[Music/JohannSebastianBach J.S. Bach]]'s ''Toccata and Fugue in D Minor'', BWV 565, is perhaps the single most recognizable piece of pipe organ music in the western world.

If there is an OminousPipeOrgan in a HauntedHouse, it's probably playing the [[http://www.youtube.com/watch?v=_FXoyr_FyFw opening bars]] of the Toccata in D Minor.

A fully orchestrated version served as the centerpiece of ''Disney/{{Fantasia}}'''s first segment, [[DisneyAcidSequence set to increasingly trippy visuals]].

In the Francophone world, it's known for being the theme song for the edutainment show ''WesternAnimation/IlEtaitUneFois l'Homme'' (''Once Upon a Time... Man'').

There has been some debate as to whether Bach actually wrote the piece at all. It contains a number of stylistic anachronisms, which suggest it may have been written after 1750. (Then again, the later styles had to draw their inspiration from ''somewhere'' -- perhaps they drew their inspiration from this piece, and Bach actually started it all!) Another theory is that it was written down poorly by one of Bach's students. Another school of thought holds that it may have been originally written for violin (possibly by Bach but likely by another unknown composer), and then transcribed by Bach for the organ. Bach's most recent biographer Christoph Wolff believes that it's definitely by Bach, but that its stylistic oddities can be explained by its being an [[EarlyInstallmentWeirdness early work]].

Note that Bach actually wrote ''two'' sets of pieces entitled ''Toccata and Fugue in D minor,'' but the second (BWV 538)'s toccata is actually in the Dorian mode for the majority of its duration and uses a key signature (no flats and no sharps) usually used for A minor. The fugue is, however, in the traditional minor scale (Aeolian mode). This piece is, of course, nowhere near as well known as BWV 565.