String Quartet No. 3 in G major, K. 156 — Mozart’s Milanese experiment in miniature
von Wolfgang Amadeus Mozart
Mozart’s String Quartet No. 3 in G major, K. 156 (1772) belongs to the so‑called “Milanese” set (K. 155–160), composed when the 16‑year‑old composer was in northern Italy. Cast in three concise movements, it pairs an Italianate, quicksilver opening with an unexpectedly shadowed slow movement in E minor—an early sign of Mozart’s taste for expressive contrast within ostensibly light chamber forms.
Background and Context
In late 1772 Mozart was in Milan, immersed in operatic work (Lucio Silla) and the musical life of northern Italy. The six “Milanese” quartets (K. 155–160) arise from this moment: pieces that adopt the outward manners of the Italian divertimento—short, three-movement designs and a generally bright surface—yet already hint at the more searching quartet style Mozart would cultivate a decade later in Vienna.[1]
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K. 156 is especially worth attention because it compresses a striking dramatic arc into a small frame. The surrounding set often keeps finales light (minuets or rondos) and treats the quartet as elegant, sociable music; within that expectation, Mozart repeatedly places a minor-mode “spine” at the center. In K. 156 the contrast is unusually pointed: a buoyant G-major opening is followed by an Adagio in E minor, before the work returns to dance character for a minuet whose Trio turns dark again (G minor).[1]
Composition and Dedication
Mozart composed the quartet in Milan in 1772, during his second Italian sojourn (winter 1772–73), when he was sixteen.[1] Like the other Milanese quartets, K. 156 uses standard string-quartet scoring—two violins, viola, and cello—and survives with autograph material preserved in the Berlin State Library, a reminder that these “apprentice” works are also carefully transmitted artifacts of Mozart’s early career.[1]
No dedicatee is securely attached to K. 156 in the way that Mozart’s later “Haydn” quartets are; these Italian works function more as a set of exploratory essays in a genre still finding its social and artistic identity in the early 1770s. Even within this early context, Mozart revised: the Köchel-Verzeichnis (Mozarteum) documents an initial, later-deleted version of the second movement (an intriguing sign that the expressive center of the quartet was something he rethought).[2]
Form and Musical Character
Instrumentation (standard):
- Strings: 2 violins, viola, cello[3]
Movements:
- I. Presto (G major)
- II. Adagio (E minor)
- III. Tempo di Menuetto – Trio (G minor)[1]
I. Presto
The first movement sets the “Italian” tone: quick, cleanly profiled phrases and bright G-major harmony, with the first violin often carrying a vocal, aria-like line. Yet the writing is not mere accompaniment-plus-melody. Mozart already shows a feel for quartet dialogue—short motives passed among voices and a lively sense of conversational timing—rather than treating the lower parts as purely harmonic padding.
II. Adagio (E minor)
The slow movement is the quartet’s expressive heart. Its choice of E minor (a key a step away from the home tonic, but emotionally worlds apart) gives the music a slightly unsettled, nocturnal hue. In the Milanese set, Mozart repeatedly places minor-mode slow movements at the center; K. 156 is one of the clearest examples of how such a movement can deepen an otherwise modest three-movement design.[1]
A further point of interest is that Mozart evidently drafted (and then removed) a different version of this movement, preserved in the Köchel-Verzeichnis as a first, deleted version. That revision history suggests he was not only writing fluently, but also editing toward a particular expressive profile—an important habit for a composer in the midst of learning what the quartet could “say.”[2]
III. Tempo di Menuetto – Trio (G minor)
The finale returns to courtly dance, but with a characteristic Milanese twist: the minuet in the major mode is paired with a Trio in the minor, so that the work’s brightness is shaded at the last moment before the closing return.[1] This major–minor oscillation—social poise disturbed by a brief, more intimate darkness—can feel like an early analogue to the emotional “stagecraft” Mozart would later master in opera.
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Reception and Legacy
K. 156 has never competed in fame with Mozart’s mature quartets—especially the six dedicated to Joseph Haydn (1782–85) or the later “Prussian” set—but its value lies precisely in what it reveals about Mozart’s formation.[3] The Milanese quartets show him absorbing Italianate chamber conventions (brevity, three-movement plans, a minuet-style close) while experimenting with sharper expressive contrasts than the genre’s background-music reputation might suggest.[1]
For listeners, the quartet’s distinctiveness is easy to grasp: it is concise, immediately fluent, and yet anchored by a slow movement whose minor-key seriousness feels disproportionate—in a productive way—to the work’s modest scale. In performance, K. 156 rewards players who treat it not as a “juvenile divertimento,” but as chamber music with real rhetorical pacing: brightness, shadow, and a final return to dance that closes the circle with a knowing glance into the minor.
[1] Wikipedia overview of the Milanese quartets (K. 155–160): context in Milan, three-movement plan, minor-mode middle movements; lists K. 156 movements and keys.
[2] Köchel-Verzeichnis (Mozarteum) entry documenting a first, deleted version of the second movement associated with K. 156.
[3] IMSLP work page for String Quartet No. 3 in G major, K. 156/134b: instrumentation category and movement list (Presto, Adagio, Tempo di Menuetto).