The Neapolitan Chord
A major chord built on a note that shouldn't exist in the key — the Neapolitan is one of the darkest, most dramatic pre-dominant sounds in all of harmony.
What is the Neapolitan chord?
The Neapolitan chord, labeled bII, is a major triad built on the lowered 2nd scale degree. In C major, the 2nd degree is D — lower it a half-step to Db, and stack a major triad on top: Db–F–Ab. That's the Neapolitan, and despite the borrowed root, it functions as a pre-dominant chord — a substitute for ii or IV, sitting right before the dominant in a cadence.
Why "N6"?
The Neapolitan is almost always written and played in first inversion, with its 3rd (F, the scale's normal 4th degree) in the bass instead of its root (Db). In figured-bass shorthand, a first-inversion triad is labeled with a "6," so the Neapolitan in first inversion is called N6. Putting F in the bass avoids an awkward direct half-step clash between the tonic and the chord's root, and keeps the bass line moving smoothly toward the dominant.
The half-step pull to the dominant
The Neapolitan's root, Db, sits just a half-step above the tonic — and a half-step above the dominant's leading area too, which gives N6 a strong gravitational pull down into V (often by way of a cadential 6/4, a I chord in second inversion that delays the true dominant arrival). That tight half-step voice leading is exactly what makes the Neapolitan sound so tense and "foreign" compared to the diatonic ii or IV chords it substitutes for.
Common questions
What is the Neapolitan chord?
A major triad built on the lowered 2nd scale degree, labeled bII — a borrowed pre-dominant harmony with a dark, dramatic color that typically resolves to V.
Why is it called N6?
Because it's almost always used in first inversion, with its 3rd in the bass — figured-bass notation calls a first-inversion triad a "6" chord.
Where does the Neapolitan chord resolve?
Typically to V, often via a cadential 6/4, and from there to I — its bass note sits a half-step above the tonic, pulling strongly toward the dominant.
Is the Neapolitan chord a borrowed chord?
Yes — bII doesn't occur naturally in the major scale, so it's borrowed chromatic harmony, related in spirit to modal interchange.
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