Symphony No.93 in D major, Hob. I:93 "Sinfonia 93"

The introduction is twenty measures long and marked "Adagio". It opens with the orchestra playing the tonic note, D, in unison, avoiding the establishment of the home key of D major with root-position harmony. The introduction then proceeds on an harmonic excursion, through the dominant (A major), a Neapolitan chord (E♭ major, built on G), a diminished seventh, the parallel minor (D minor), and the subdominant minor (G minor), before concluding with a dominant seventh chord.