Discover the harmony behind Django Reinhardt’s Belleville step by step. From the simple I–vi–ii–V skeleton to secondary dominants, the borrowed minor iv, diminished passing harmony and the temporary move toward F# major, this analysis shows how a few clear functions create the tune’s distinctive jazz colour.
From four simple functions to the sound of Belleville
At first glance, the harmony of Belleville can look much more complicated than it really is. Chords such as D6/9, A13♭9, Gm6 or F#6/9 give the tune its colour, but underneath them is a surprisingly clear harmonic structure.
A useful way to understand the tune is to remove the colours first and look only at the functions.
The harmonic skeleton
One of the central movements is the classic:
This is one of the most familiar harmonic cycles in tonal music. The tonic D establishes home, Bm moves away without creating much tension, Em prepares the dominant, and A7 creates the pull back to D.
In the full arrangement those same functions may appear as:
The harmony has not fundamentally changed. The added notes change the colour, not the direction of the progression.
The 6th and 9th make the tonic less plain than a simple D major triad. The minor 7ths soften Bm and Em and connect them naturally to jazz vocabulary. On A, the ♭9 and 13 intensify the dominant without changing its job: it still wants to resolve to D.
This distinction is important. Jazz harmony often sounds complicated because of the chord symbols, while the underlying functions may remain very simple.
Leaving home: D7 → G
Belleville then introduces another important movement:
The first D is the tonic: I.
But when D becomes D7, the C♯ of D major is replaced by C natural. That single note changes the role of the chord. D7 is no longer functioning as home — it becomes the dominant of G.
This is a secondary dominant: a temporary dominant that points toward a chord other than the main tonic.
The voice leading makes the move especially convincing. Inside D7, the notes F♯ and C create the dominant tension; when the harmony moves to G, they can resolve by semitone to G and B.
So the progression does not simply jump from I to IV. It briefly makes the IV chord feel like a destination of its own.
One note changes the mood: G6 → Gm6
Then comes one of the characteristic colours of the tune:
In D major, G major is the normal IV chord.
G minor does not belong to D major. It is borrowed from the parallel key of D minor, so functionally we hear:
What makes the movement so effective is how little actually changes.
Yet that one semitone changes the emotional colour dramatically. The bright major subdominant becomes a darker borrowed minor subdominant before resolving home.
This is a good example of why harmonic colour is not just about adding more notes. Sometimes changing one note creates more character than adding an entire extension.
The bridge: moving away from D
The bridge goes further.
It begins with the borrowed minor subdominant, Gm6, before returning briefly to D. From there the harmony moves toward F# major.
From the perspective of D major, F# major is unusual. The diatonic chord on the third degree would normally be F#m, not F# major.
But Belleville does not merely use F# as an isolated chromatic chord. It gradually starts treating F# as a temporary tonic.
A characteristic bridge movement is:
The important destination is:
Once F# is heard as the temporary key centre, this becomes perfectly ordinary.
Why the diminished chord works
Between F# and G#m sits Gdim7.
Rather than thinking of it only as a mysterious diminished chord, listen to what the individual voices can do.
From F#6 into Gdim7 and then into G#m7, several notes can move by very small chromatic steps. The diminished chord acts as a compact voice-leading bridge between the temporary tonic and the ii chord that follows.
Its job is therefore both harmonic and melodic: it keeps the progression moving while allowing the inner voices to slide chromatically.
This is one of the reasons diminished chords appear so naturally in this style.
Returning home
After the temporary ii–V–I in F#, A7 restores the original direction.
In D major:
so the dominant immediately tells the ear where home is again.
It travels surprisingly far, but the route back is completely logical.
Adding the jazz colours
Once the harmonic structure is clear, the richer chord symbols make much more sense.
Likewise:
And in the bridge:
From the skeleton to the Belleville sound
This is also why Belleville is useful as a learning tune.
You can first play its harmonic skeleton and hear the movement clearly. Then add the secondary dominant. Then the borrowed minor iv. Then the bridge and temporary key centre. Only after those relationships make sense do the sixths, sevenths, ninths and altered dominants need to be added.
The final sound is sophisticated, but its structure is not arbitrary.
That is what makes Belleville more than a collection of beautiful chord shapes — and what makes its harmony transferable to many other jazz standards.