Symphony in D (lost), K. 66c (D major)
av Wolfgang Amadeus Mozart
Mozart’s Symphony in D (lost), K. 66c, is a doubtful entry traditionally placed around 1769 (perhaps Salzburg), when the composer was 13. No score survives, and the work is known chiefly from catalogue transmission rather than from performable music.
Mozart's Life at the Time
In 1769, Wolfgang Amadeus Mozart (1756–1791) was living primarily in Salzburg under the close supervision of his father, Leopold, and writing intensively for local ecclesiastical and courtly needs. The year sits just before the first Italian journey (late 1769–1771), a period when Mozart was rapidly absorbing orchestral style while still composing at a brisk, almost workshop pace [1].
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Musical Character
K. 66c is described simply as a Symphony in D major—but because the music itself is lost, its movements, orchestration, and even its authorship cannot be securely established [1]. Modern reference lists therefore treat it among the symphonies of spurious or doubtful authenticity, rather than alongside Mozart’s securely transmitted early Salzburg symphonies in D major (which typically favor bright, ceremonial writing and straightforward three- or four-movement plans) [2]. In practical terms, K. 66c functions today less as a describable musical document than as a trace of the prolific orchestral milieu in which the 13-year-old Mozart was learning to think symphonically—sometimes in works that have not reached us, or may not have been his at all [3].
[1] IMSLP — List of compositions by Mozart by Köchel number (entry includes K. 66c: Symphony, D major, 1769, lost).
[2] Wikipedia — Mozart symphonies of spurious or doubtful authenticity (context for doubtful/lost symphony attributions, including K. 66c).
[3] Mozarteum (Köchel Verzeichnis) — KV 66c: Symphony in D (catalogue record).