Stabat mater for Four Voices in G major (lost), K. 33c
de Wolfgang Amadeus Mozart
Mozart’s Stabat mater for four voices in G major (K. 33c) is a lost sacred work, traditionally dated to 1766, when the composer was only ten. No music survives—only documentary traces—so the piece is best treated as a doubtful or possibly spurious entry rather than a secure part of the canon.
What Is Known
The work is listed in Leopold Mozart’s 1768 catalogue of his son’s early compositions as “a short Stabat Mater à 4 voci without instruments,” with the modern identification “KV 33c (lost)” supplied in the scholarly apparatus to that document [1]. The Internationale Stiftung Mozarteum’s Köchel-Verzeichnis entry likewise describes K. 33c as a Stabat mater “for 4 voices,” transmitted as “lost,” and assigns it to the category of Smaller Church Works [2].
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Neither a score nor even a musical incipit is known to survive, and the place of origin is uncertain in the secondary tradition (often given as Paris or Salzburg, 1766). Given the complete loss of musical sources and the broader problem of doubtful attributions among early, poorly transmitted items, K. 33c is prudently regarded today as a work of doubtful authenticity.
Musical Content
Because no notation survives—only the title and scoring—nothing reliable can be said about themes, structure, or style. At most, the description “without instruments” suggests an unaccompanied four-part texture (likely SATB), consistent with compact devotional settings a prodigiously trained ten-year-old might have attempted under Leopold’s supervision.
[1] Leopold Mozart’s 1768 catalogue (English transcription PDF) — includes the entry “A short Stabat Mater à 4 voci without instruments,” annotated as KV 33c (lost).
[2] Internationale Stiftung Mozarteum, Köchel-Verzeichnis entry for KV 33c — lists the work as for 4 voices, transmission lost, Smaller Church Works.