Symphony in B♭ major (lost), K. 66d
ヴォルフガング・アマデウス・モーツァルト作
Mozart’s Symphony in B♭ major (K. 66d) is a lost, dubiously attributed juvenile work, traditionally placed around 1769, when the composer was 13. No complete score survives, and modern cataloguing treats the symphony as a work of doubtful authenticity.
Mozart's Life at the Time
In 1769, Wolfgang Amadeus Mozart (1756–1791) was 13 and based largely in Salzburg, on the verge of the first Italian journey he would undertake with Leopold later that year. In the Köchel-Verzeichnis as maintained by the International Mozarteum Foundation, K. 66d is explicitly described as a lost work of doubtful authenticity, and it is dated only approximately (with uncertainty even about the year). [1]
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Musical Character
Because the music itself is lost, K. 66d cannot be described in terms of themes, movement layout, or orchestration in any secure way. The symphony is nonetheless referenced in modern reference literature among Mozart symphonies of spurious or doubtful authenticity, where it is grouped with other early, poorly transmitted works whose attribution has been questioned; in that context it is treated as a symphony known only from secondary traces rather than an autograph score. [2]
[1] International Mozarteum Foundation (Köchel-Verzeichnis), work entry for KV 66d: status “lost work of doubtful authenticity,” key B♭ major, and uncertain dating.
[2] Wikipedia reference list of Mozart symphonies of spurious or doubtful authenticity, including K. 66d and brief notes on its doubtful status and transmission.