Finale of a Symphony ("Ascanio in Alba") in D major, K. 120
de Wolfgang Amadeus Mozart
Mozart’s Finale of a Symphony in D major (K. 120), written in Milan in 1771 when he was just fifteen, is a brilliant Presto conceived to round off the sinfonia connected with his court serenata Ascanio in Alba (K. 111). Although long catalogued as a “symphony,” the movement is best understood as a festive Italianate curtain-raiser’s finale—compact, athletic, and scored with unusually bright orchestral colors for the young composer.
Background and Context
In the autumn of 1771 Wolfgang Amadeus Mozart (1756–1791) was back in Milan during his Italian travels, now moving with increasing ease in the city’s theatrical and ceremonial world. The commission for Ascanio in Alba (K. 111)—a festa teatrale on a libretto by Giuseppe Parini—was tied to dynastic celebrations, and its first performance took place at the Teatro Regio Ducale on 17 October 1771.[2] This is the sound-world behind K. 120: public, jubilant, and designed to make an immediate impression.
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K. 120 deserves attention partly because it sits at an intriguing crossroads in Mozart’s development. It is neither childhood “juvenilia” nor yet the Salzburg symphonic style of the mid-1770s; rather, it reflects the Italian overture tradition (sinfonia avanti l’opera)—fast–slow–fast—and the practical reality that theatrical overtures, serenatas, and “symphonies” were porous categories in the early 1770s.[1]
Composition and Premiere
The Köchel catalog and modern editorial scholarship treat the D-major complex around Ascanio in Alba as a three-movement work: the first two movements come from the opera’s overture (K. 111), while the finale—the subject here—circulated separately as K. 120 (also known historically as K. 111a). The International Mozarteum Foundation’s Köchel-Verzeichnis entry explicitly links these identities, listing the “symphony in D after the overture to Ascanio in Alba” as K. 111 with “other work numbers” including K. 120 / K. 111a, and giving a dating span beginning on 17 October 1771.[1]
The Neue Mozart-Ausgabe commentary (as reflected in the Digital Mozart Edition’s English preface for the symphonies volume) notes that Mozart combined the overture material with this finale, and discusses the finale’s relationship to Italian overture finales—supporting the view that this Presto was conceived to supply the decisive, concluding “kick” expected in the genre.[3]
As with many functional orchestral movements of the period, the precise circumstances of the finale’s first performance are not documented in the manner of later Viennese premieres. The most plausible context remains the Milanese festivities surrounding Ascanio in Alba in October 1771, where an energetic concluding movement would have been both stylistically appropriate and theatrically useful.[2]
Instrumentation
One striking reason to listen to K. 120 is its festive scoring. The Köchel-Verzeichnis lists a full, brilliant complement including flutes and oboes together, plus trumpets and timpani—an orchestral “shine” associated with public celebration.[1] IMSLP’s work page for the finale (presented under the long-standing symphony-number tradition) gives essentially the same forces and even preserves the vivid historical color of the trumpet designation (“trombe lunghe”).[4]
- Winds: 2 flutes, 2 oboes, 2 horns
- Brass: 2 trumpets
- Percussion: timpani
- Strings: violins I & II, viola, cello, double bass
For a fifteen-year-old, this is confident public writing: not chamber-scale experimentation, but orchestral rhetoric aimed at filling a large space and crowning an event.
Form and Musical Character
K. 120 is a single movement marked Presto, and its character is exactly what the marking promises: bright, forward-driving, and built for propulsion rather than reflection.[4] In the Italian overture tradition, the finale’s job is to send the audience into the drama (or, in a serenata context, onward into the spectacle) with an impression of unstoppable momentum; Mozart answers that brief with crisp thematic profiles and energetic cadential punctuation.
Listeners can also hear Mozart’s early mastery of orchestral “conversation”. D major encourages ringing brass and agile string figuration; with trumpets and timpani present, phrase endings can be underlined as ceremonial “points of arrival,” while the winds brighten the texture and help articulate formal joints.[1] The result is not merely loud or fast: it is publicly intelligible music, where rhythmic snap and clear tonal goals keep the form readable even at high speed.
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From the standpoint of Mozart’s symphonic evolution, the movement is instructive. It demonstrates how, before the later Salzburg symphonies’ broader argument and before Vienna’s expansive finales, Mozart could already craft a concise closing movement whose excitement is generated by tight motivic work, rapid harmonic confirmation, and bright orchestral coloring—skills that would later be redeployed in far more complex contexts.
Reception and Legacy
K. 120’s reception has long been shaped by cataloging history. Older traditions counted it among Mozart’s “early symphonies,” and it still appears in that guise on reference sites and in performance materials; IMSLP, for instance, preserves the conventional designation “Symphony No. 48” while stating plainly that it is now known to be the finale of the *sinfonia* to *Ascanio in Alba.[4](https://imslp.org/wiki/Symphony_No.48_in_D_major%2C_K.120%2F111a_%28Mozart%2C_Wolfgang_Amadeus%29) Modern Mozart scholarship, reflected in the Mozarteum’s Köchel-Verzeichnis, instead emphasizes its relationship to K. 111 and its function as part of a theatrical sinfonia complex rather than a stand-alone concert symphony in the later sense.[1]
That very “in-between” status is why it merits renewed attention. K. 120 offers a concentrated glimpse of Mozart’s Italian period orchestral style: ceremonial brilliance without heaviness, speed without blur, and a practical understanding of what an opening-or-closing movement must do in a festive theatrical environment. Heard on its own, it is a compact showpiece; heard in relation to Ascanio in Alba, it becomes a vivid reminder that Mozart’s symphonic thinking was forged not only in concert rooms, but also in the vivid, time-sensitive world of the eighteenth-century stage.
[1] International Mozarteum Foundation (Köchel-Verzeichnis): KV 111 entry linking K. 120/111a; dating and instrumentation.
[2] Wikipedia: Ascanio in Alba — premiere date (17 October 1771) and basic context for the serenata.
[3] Digital Mozart Edition (Neue Mozart-Ausgabe preface PDF for Symphonies IV/11/2): editorial remarks on combining the overture with the finale and genre context.
[4] IMSLP work page: Symphony No. 48 in D major, K. 120/111a — identification as finale from Ascanio in Alba sinfonia; instrumentation and movement details.