A Harmonie is an ensemble of woodwind instruments that became very popular during the late-eighteenth and early-nineteenth centuries. Their martial-like sound was very suitable for outdoor performances and made them inseparable to Central-European nobles. The name Wenzel Sedlak, a clarinetist, composer and arranger, is indissolubly associated with Harmonie. The conductor of the Viennese ensemble under the patronage of the Prince of Liechtenstein, he was responsible for numerous arrangements of orchestral and operatic works, such as Fidelio. A doubt underlies the authorship of the Harmonie arrangement of Beethoven’s Seventh Symphony, as some researchers have seen the composer as its arranger. Premiered in 1812 this symphony was defined by Wagner as “the apotheosis of dance”.