Ariadne musica is a collection of organ music by Johann Caspar Ferdinand Fischer, first published in 1702. The main part of the collection is a cycle of 20 preludes and fugues in different keys, so Ariadne musica is considered an important precursor to Johann Sebastian Bach's The Well-Tempered Clavier, which has a similar structure.

The title refers to the Greek myth in which Theseus finds his way out of Minotaur's labyrinth using a ball of thread that Ariadne, daughter of King Minos of Crete, gave him. Similarly, the music in the collection can be said to guide the listener through a labyrinth of keys. Fischer also used Greek mythology to name the pieces in another large scale music collection of his, Musikalischer Parnassus.

The first edition of Ariadne musica was made in 1702 in Schlackenwerth. The work was reprinted several times during Fischer's life. The original print mentioned by Johann Gottfried Walther in Musicalisches Lexicon is now lost, but a manuscript copy survives.

Johann Caspar Ferdinand Fischer (some authorities use the spelling Johann Kaspar Ferdinand Fischer) (c.1656 – August 27, 1746) was a German Baroque composer. Johann Nikolaus Forkel ranked Fischer as one of the best composers for keyboard of his day; however, partly due to the rarity of surviving copies of his music, his music is rarely heard today.
Played on Hauptwerk sample set of Giubiasco, Switzerland. Thumbnail is a view of the actual organ

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