Six Sketches & Fragments toward a Mass in B♭ major (K. Anh. H, various; incl. K. 698)
di Wolfgang Amadeus Mozart
Mozart’s six surviving sketches and fragments toward a Mass in B♭ major (K. Anh. H, various; including the separate instrumental theme K. 698) preserve fleeting glimpses of liturgical thinking rather than a performable setting. Often linked in scholarship to Mozart’s Vienna stay of 1770—when he was 14—these notational shards suggest a young composer testing melodic ideas, harmonic routes, and cadential plans for the Ordinary.
Background and Context
The group usually described as “six sketches and fragments to a Mass” consists not of a coherent draft score, but of small, discontinuous notations—some purely instrumental, others implying vocal or choral writing—now scattered across Köchel’s Anhang (K. Anh. H, various) and commonly discussed alongside the short B♭-major instrumental theme catalogued as K. 698 (“Theme in B-flat (fragment)”). K. 698 itself is explicitly identified as a fragmentary Thema in B♭, and it survives without any securely documented connection to a complete Mass movement [1].
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These pages are often associated with Mozart’s first Italian journey and the broader Central European musical world he encountered en route (including time spent in Vienna in 1770), at a moment when he was absorbing “learned” church styles alongside the more immediately theatrical idioms of opera and instrumental music [2] [3].
Musical Character
What can be said with confidence is mostly local: the surviving B♭-major ideas are concise, functional, and cadentially clear—music that reads like a composer’s quick-memory aid rather than a finished, texted continuity. K. 698, as a “theme,” points to Mozart’s habit of isolating a singable melodic kernel first, leaving matters of continuation, scoring, and text underdetermined [1].
In character, B♭ major naturally invites the ceremonial warmth familiar from Mozart’s later sacred and festive works; yet in these fragments one hears (or rather, sees) the teenager’s workshop: short phrases, harmonic signposts, and the kind of economical turns that could be expanded into choral periods, brief fugal entries, or orchestral lead-ins depending on need. Because no complete Mass movement can be reconstructed securely from the extant material alone, the fragments are best valued as developmental evidence—Mozart thinking in liturgical commonplaces, but already with an ear for memorable thematic profile and clean tonal architecture.
[1] Wikipedia: Köchel catalogue entry list including K. 698 (“Theme in B-flat (fragment)”).
[2] Encyclopaedia Britannica: Mozart biography (context for 1770 travels and early development).
[3] Wikipedia: Wolfgang Amadeus Mozart biography (overview of 1770 period and travels, for general context).