Ballet for *Idomeneo* in D major (K. 367)
ヴォルフガング・アマデウス・モーツァルト作
Mozart’s Ballet for Idomeneo in D major (K. 367), composed for the Munich premiere season of Idomeneo, re di Creta (K. 366) in 1781, is one of his most ambitious essays in “opera-ballet” spectacle within an Italian opera seria framework. Written when he was 25, it turns what could have been dispensable court entertainment into a concentrated study in orchestral color, French-derived dance types, and ceremonial D-major brilliance.
Background and Context
By the late 1770s, Munich had inherited the formidable musical infrastructure of Mannheim, and the court of Elector Karl Theodor cultivated a taste for large-scale theatrical display—choruses, scenic effects, and (crucially) ballet. For Mozart, then still chafing under Archbishop Colloredo’s Salzburg regime, the Munich commission for Idomeneo represented something rare: an opera seria mounted with first-rate forces and the time (at least in principle) to shape rehearsals and details.
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An unusually early, non-official “buzz” around the project survives in a printed travel-letter dated 20 December 1780, urging a correspondent to come to Munich for carnival because “the young Herr Mozard of Salzburg” would set a new opera and—so the writer predicts—receive “universal applause.” That small paragraph is revealing: Idomeneo was already being marketed as an event, and Mozart’s name—still primarily associated with Salzburg—was becoming part of the draw.1
In that environment, ballet was not a decorative add-on; it was part of courtly expectation. Yet Mozart’s ballet for Idomeneo is notable precisely because it was composed by the opera’s own composer. As later commentators have often observed, Italian opere serie commonly imported ballet numbers by someone else; K. 367 is an exception that signals both the prestige of the Munich production and Mozart’s determination to control the work’s musical “frame” from overture to final curtain.2
Composition and Commission
Mozart’s correspondence shows him treating the ballet as a concrete managerial requirement rather than an abstract artistic wish. In a letter of 30 December 1780 to his father Leopold, he reports that he is to write a divertissement for the opera—explicitly because the Munich theater management wanted it.3 The choice of term matters: divertissement points toward the French theatrical lineage (the suite-like, staged dance sequences that could crown an act or a whole work), not merely a few interchangeable dances.
The surviving source situation also hints at the ballet’s practical function. The autograph score of Idomeneo (as preserved and studied in modern scholarship and facsimile contexts) includes the ballet material as part of the production’s musical dossier, underscoring that K. 367 was conceived for the same high-stakes premiere cycle as the opera itself, not as a later concert-suite convenience.4
The most discussed “composition” issue is not whether Mozart wrote it, but where it belonged in the evening. Modern scholarship has debated placement: one view (associated with the Neue Mozart-Ausgabe editorial tradition) proposes a position earlier in the opera, while another—most famously articulated by Daniel Heartz—argues that the D-major grandeur of the Pas seul sounds like a deliberately ceremonial conclusion, the kind of courtly apotheosis that sends an audience out under the sign of sovereign order.3
Libretto and Dramatic Structure
Because K. 367 is ballet music, it does not “set” Varesco’s Italian text; its dramaturgy is instead ritual rather than verbal. This is precisely why it matters in Idomeneo. The opera’s drama moves from storm-driven chaos toward the reassertion of civic and divine order, culminating in a public resolution (the surrender of power and the promise of a renewed polity). A concluding ballet—especially in a radiant public key like D major—functions as a scenic analogue to that restoration.
It is tempting, from a modern perspective, to treat a final ballet as an expendable appendage, since many later productions cut it for reasons of pacing. Yet in the Munich court context, the ballet is part of what makes the evening legible as court theatre: it shifts from individual psychological crisis to collective, representational celebration. One might say that the ballet does not advance the plot so much as “stabilize” it—transforming private catastrophe into public ceremony.
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The placement debate is therefore also a dramaturgical debate. If the ballet follows the final chorus, it becomes a kind of coronation of the opera’s moral-political settlement; if it appears earlier, it behaves more like an inter-act spectacle. Either way, Mozart’s decision to write the music himself means the ballet speaks in the same orchestral language as the opera’s most symphonic moments.
Musical Structure and Key Numbers
K. 367 is often heard today in excerpts—most commonly the Chaconne and Pas seul—but its expressive logic is best grasped as a sequence that alternates courtly poise with orchestral “theatre.” The dance types themselves evoke a French genealogy (especially in the use of variation forms and stylized step-rhythms), yet the scoring and motivic intensity are unmistakably Mozart of 1780–81.
Dance types (as commonly identified)
Modern reference descriptions typically list the ballet’s constituent numbers as a suite of stylized dances and variation forms—Chaconne, Pas seul, Passepied, Gavotte, and Passacaille—which already suggests that Mozart was thinking in terms of contrasted “panels,” not a single monochrome divertissement.5
The D-major “public style”
D major is Mozart’s ceremonial “bright metal” key—associated with trumpets, timpani, and the sound of public festivity. In K. 367, this is not merely loudness; it is a sonic emblem of legitimacy. Heard at the end of Idomeneo, the key itself does dramaturgical work: it recasts the opera’s turbulent sea and sacrificial dilemma into the stable geometry of court dance.
The Chaconne: variation as spectacle
The Chaconne (and, in some catalog descriptions, the closely related Passacaille) points toward a Baroque lineage in which repeated-bass or repeated-harmony variation forms were ideal for extended stage display. Mozart’s twist is to make variation feel symphonic: the ear follows orchestration and phrase architecture as much as it follows the “dance.” When performed with crisp articulation, the Chaconne can sound less like antique revival than like a laboratory for Mozart’s late-1770s orchestral rhetoric—tight motivic cells, brilliant tuttis, and strategically spaced lyrical relaxations.
The Pas seul: virtuosity without a soloist
The Pas seul is a fascinating paradox: it is “solo” dance music whose virtuosity is primarily orchestral. In performance, one hears Mozart writing for an ensemble that could play—an orchestra steeped in Mannheim-style discipline and dynamic nuance. This helps explain why some scholars insist it belongs at the very end: the music behaves like a culminating display piece, a final courtly flourish in which the orchestra itself becomes the star.3
Premiere and Reception
The ballet belongs to the premiere season of Idomeneo at the Munich court theatre, first performed on 29 January 1781 (with Mozart conducting).3 Yet the reception history of the ballet is tangled with the opera’s: later traditions frequently trimmed dance sequences to tighten drama, and some modern stagings dispense with the ballet entirely or replace it with different music.
Nevertheless, the very existence of K. 367—Mozart supplying a court-required divertissement himself—suggests that the Munich management cared about the spectacle, and Mozart cared about the unity of authorship. Even when the ballet is separated from the opera and heard in the concert hall, it tends to “carry” a whiff of stage: not narrative, but gesture—entrances, groupings, and the kind of musical architecture that implies movement.
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One can also sense, in the early printed anticipation quoted above, that Munich’s carnival public expected a comprehensive theatrical experience rather than a purely text-driven drama.1 In that sense, K. 367 is part of what made Idomeneo feel like a major court occasion rather than merely a new score.
Performance Tradition and Legacy
K. 367’s modern life has been shaped by a basic practical question: should it be treated as detachable concert music, or as an integral dramatic “final act” of Idomeneo? The scholarship-driven placement debate has encouraged conductors and stage directors to make an explicit choice rather than treating the ballet as optional wallpaper.
When the ballet is retained, it can change the perceived ending of the opera. Without it, Idomeneo may end in a moralized choral resolution; with it, the work ends by re-entering the courtly world of ordered bodies and stylized steps—an ending that reframes the opera’s Enlightenment dilemmas as something the state can stage and thus contain. This is one reason the ballet remains more than an appendix: it is a key to understanding the Munich Idomeneo as a hybrid of Italian opera seria and French-inflected court theatre.
In purely musical terms, K. 367 has also become a touchstone for how Mozart absorbs older dance archetypes (chaconne, passacaglia) into late-18th-century orchestral language. That synthesis—antique form, modern sonority, and theatrical purpose—helps explain why the ballet is frequently excerpted in orchestral programs: it offers “Mozart-the-symphonist” in explicitly theatrical clothing.
Finally, the International Mozarteum Foundation’s Köchel catalogue pages for individual ballet components preserve concrete data (instrumentation, revisions, and work-relations) that remind us how materially this music belonged to a specific production apparatus—copied, revised, and fitted to stage needs, not merely composed for abstract listening.2
[1] Mozart: New Documents — “An early report on Idomeneo (20 December 1780)” (Dominicus Beck text and commentary by Dexter Edge)
[2] Internationale Stiftung Mozarteum — Köchel catalogue entry KV 367/05 “Passacaille” (instrumentation notes; context for Mozart’s ballets as exceptions)
[3] Wikipedia — Idomeneo (overview; letter of 30 Dec 1780 about the divertissement; placement debate including Daniel Heartz)
[4] Mozart Facsimiles (pdf) — watermark/facsimile notes referencing *Idomeneo* autograph materials including Ballet Music K. 367 and NMA critical reports
[5] Daniels’ Orchestral Music Online — “Idomeneo: Ballet Music, K.367” (dance-number listing as commonly performed)