This Fantasia et Fuga a 5 voci op. 5 was published in 1855 as Merkel's second organ piece.
The composer performed the piece 1859 at a concert in Dresden's Frauenkirche on the Silbermann organ. The work is dedicated to his teacher Johann Schneider.
Like the nine sonatas and the four other fantasies, the work is in three movements. It begins with an Allegro maestoso, characterised by an alternation between homophonic sections in dotted rhythm and fugal sections. The second movement is pastoral and lyrical, and the concluding plenum fugue with its two-bar theme seems, like the first part, to be inspired by a well-known work from the organ literature...