Kyrie in D minor (doubtful), K. 90
ヴォルフガング・アマデウス・モーツァルト作
Mozart’s Kyrie in D minor (K. 90) is an isolated setting of the Mass Ordinary, transmitted as a complete movement but regarded as of doubtful authenticity. It is usually placed in Salzburg and dated to around July–December 1772, when Mozart was about fifteen or sixteen.[1]
Background and Context
In Salzburg, the teenaged Wolfgang Amadeus Mozart (1756–1791) was increasingly absorbed into the musical routines of Catholic worship; short, practical liturgical movements could be written for immediate use in church services. K. 90 belongs to that world in function and scale, yet its authorship has long been treated with caution: the Mozarteum’s catalogue lists the work’s authenticity as doubtful.[1] Modern performing materials commonly present it simply as a compact choral Kyrie with organ accompaniment (SATB + organ), reflecting the kind of forces readily available in Salzburg ecclesiastical practice.[2][3]
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Musical Character
Scored for Choir (SATB) with Organ continuo, the Kyrie projects an appropriately penitential cast in D minor, with choral writing that suggests an older, more stile antico (learned, churchly) ideal rather than the theatrical brilliance of Mozart’s stage works.[2] Its concision is itself telling: as a single movement, it seems designed to fulfill a specific liturgical need efficiently, relying on sober harmony, clear cadential points, and the organ’s steady support rather than instrumental color.[3] Heard in the context of Mozart’s Salzburg adolescence, the piece—whoever its true author—fits the period’s blend of devotional restraint and practical musicianship: music intended to serve the rite first, and to impress only within those bounds.[1]
[1] Mozarteum (Köchel Verzeichnis) work entry for K. 90: status ‘authenticity: doubtful’ and dating in Salzburg (07–12/1772).
[2] Bärenreiter US product page for *Kyrie in D minor, K. 90* (editor Monika Holl), listing instrumentation SATB choir and organ.
[3] Carus-Verlag work page for *Kyrie in D minor* KV 90 (1772 ?), giving scoring (SATB, organ), key, and approximate duration.