Contredanse in B♭ major, K. 123 (Rome, 1770)
von Wolfgang Amadeus Mozart
Mozart’s Contredanse in B♭ major (K. 123) is a compact orchestral dance written in Rome in April 1770, when the composer was just fourteen. Modest in scale but vivid in craft, it offers a rare glimpse of Mozart turning his Italian tour experiences into social music designed for real bodies in motion.
Background and Context
In Mozart’s catalogue, the dances can look like light marginalia—functional pieces intended for convivial rooms rather than concert halls. Yet they are also laboratories: places where the young composer refines phrase-structure, orchestral balance, and the art of writing music that communicates instantly.
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The Contredanse in B♭ major, K. 123 belongs to the first Italian journey (December 1769–March 1771), when Wolfgang Amadeus Mozart (1756–1791) travelled with his father, Leopold Mozart, through the peninsula in a campaign of auditions, patronage visits, and musical encounters. Rome, visited in Holy Week 1770, was one of the tour’s prestige centers—famous for liturgy and antiquity, but also for aristocratic salons where entertainment and display mattered as much as devotion.
Against that backdrop, K. 123 is best heard as a piece of practical courtly sociability: a short, clear, rhythmically regular dance that could be taught, repeated, and enjoyed—while still bearing the unmistakable stamp of Mozart’s melodic poise.
Composition and Premiere
The most specific contemporary testimony comes from Leopold. Writing from Rome on 14 April 1770, he reports that Wolfgang “sends you herewith a contradance,” and even specifies how it might be choreographed: five couples, with alternating smaller “solo” passages and fuller tutti passages, so that different groups of dancers enter and the whole company joins for the orchestral refrains [1]. That practical note is unusually valuable: it confirms the work’s social function and suggests that Mozart composed with an actual dance plan in mind.
Modern cataloguing commonly places K. 123 in Rome in mid-April 1770 [2]. A specific first performance is not documented; like much dance music of the period, it was presumably intended for immediate use in a private setting rather than a public “premiere” in the later concert sense.
Instrumentation
K. 123 is scored for a small, bright orchestral palette typical of eighteenth-century dance music:
- Winds: 2 oboes
- Brass: 2 horns
- Strings: violins I & II, cello and double bass (bass line in unison)
Notably, sources describe the scoring as “strings (no violas)”, a practical simplification that keeps the texture lean and the rhythm crisply articulated [3]. In this kind of music, the omission is not a “loss” so much as an aesthetic choice: the inner filling of a viola line is less important than a buoyant top line and a dependable bass.
Form and Musical Character
Although K. 123 is a single, short dance, it repays attention because it demonstrates how Mozart can generate variety without losing the square clarity dancers need.
Phrase-design for the dance floor
Leopold’s choreographic directions imply a refrain-and-episode logic: smaller groupings (the “solos”) answered by fuller orchestral moments (the tutti) [1]. Even without reconstructing precise steps, one can hear the music as inviting entrances and regroupings—music that “signals” changes through texture and cadence rather than through complex development.
Tonal and orchestral clarity
B♭ major is a natural home key for this ensemble, particularly with horns: the brass can support cadences and brighten the outer edges of the phrase, while oboes add definition to melodic contours. The string writing is predominantly two-part above a bass, producing a lucid sonority that carries well and reads easily amid ambient conversation.
Why this small piece is “Mozartian”
What distinguishes Mozart—even in occasional dance music—is the sense that the melody is not merely a rhythmic vehicle. The best contredanses balance:
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- Instant comprehensibility (regular meter, clear cadences)
- Memorable motivic profile (tunes that stick after one hearing)
- Tactile orchestration (wind color at phrase peaks, buoyant bass support)
In K. 123 those values are compressed into a minute or two: a miniature study in charm, proportion, and instrumental economy.
Reception and Legacy
K. 123 is not among Mozart’s “famous” orchestral pieces, largely because the contredanse genre was designed for the moment—seasonal, social, and replaceable. Nonetheless, the work has remained accessible through modern editions and manuscript transmission; the autograph is held in Berlin (Staatsbibliothek zu Berlin), and the piece appears in the Neue Mozart-Ausgabe dance volumes as well as in public-domain scans [3].
For today’s listener, its value is twofold. Historically, it documents Mozart’s Roman spring of 1770 from an angle quite different from the celebrated Miserere anecdote: not the prodigy in church, but the professional adolescent supplying usable repertoire on demand. Musically, it reminds us that Mozart’s gift for balance and melodic rightness was not reserved for symphonies and operas; it also animated the everyday genres that kept eighteenth-century musical life moving—quite literally—across the floor.
[1] Digital Mozart Edition (Mozarteum Foundation): Leopold Mozart letter from Rome, 14 April 1770, noting that Wolfgang sends a contredanse and giving choreographic guidance.
[2] Wikipedia: Köchel catalogue table entry for K. 123/73g (Contredanse in B♭), giving Rome and mid-April 1770 dating in the Köchel chronology.
[3] IMSLP: Contredanse/Country Dance in B-flat major, K. 123/73g — general info including key, date, and instrumentation details (2 oboes, 2 horns, strings without violas) plus access to NMA scans.