6 Variations on “Salve tu, Domine” in F major, K. 398
by Wolfgang Amadeus Mozart
Mozart’s 6 Variations on “Salve tu, Domine” (K. 398) are a compact set of keyboard variations composed in Vienna in March 1783, when the composer was 27. Taking a theatrical melody associated with Giovanni Paisiello’s opera I filosofi immaginarii and recasting it for solo keyboard, Mozart turns an apparently simple theme into a miniature study in wit, texture, and keyboard rhetoric.
Background and Context
Vienna in the early 1780s was a city in which opera, the keyboard, and improvisation overlapped constantly. Mozart had established himself as a virtuoso-pianist and was steadily building the repertory that would support his public appearances—concertos for subscription concerts, but also smaller pieces that could serve in salons, teaching, or as vehicles for extempore display.
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K. 398 belongs to a Viennese strand of Mozart’s output in which he takes a well-known tune—often from the theatre—and subjects it to a sequence of characterful variations. The theme here is associated with Giovanni Paisiello’s I filosofi immaginarii (first performed in 1779), and modern catalogues explicitly identify Mozart’s set as variations on the aria/chorus “Salve tu, Domine” from that opera [1]. In other words, the work’s “churchly” Latin title can mislead: the piece is better understood as a Viennese keyboard response to an operatic hit, not as a liturgical paraphrase.
If the set is less famous today than the variations on “Ah, vous dirai-je Maman” (K. 265), that is not because it is slighter. Rather, K. 398 is a refined example of Mozart’s middle-period keyboard style—economical, transparent, and sharply profiled—written at a moment when he was simultaneously developing the grand public language of the piano concerto.
Composition
The work is transmitted as 6 Variations on “Salve tu Domine”, for solo piano in F major, catalogued as K. 398 (also K⁶ 416e in later Köchel numbering) [1]. A widely used compilation of Köchel data places it in March 1783 in Vienna [2], aligning with the period in which Mozart was active as pianist-composer in the imperial capital.
As a genre marker, the piece is straightforward: theme and variations for a single player, designed to be immediately graspable on first hearing yet flexible enough for the composer to demonstrate variety of touch, figuration, and register [1].
Form and Musical Character
At its core K. 398 is disarmingly simple: a theme followed by six variations [1]. Yet Mozart’s art in the variation genre is not merely decorative. The listener is invited to hear how a single harmonic outline can accommodate multiple “dramatic readings,” much as an operatic melody can be inflected differently by context.
Several features make the set distinctive within Mozart’s variation output:
- Operatic provenance, keyboard diction. Even when the theme comes from the stage, Mozart avoids literal transcription. Instead, he “translates” singing lines into idiomatic keyboard textures—broken chords, hand-crossings, rapid passagework, and neatly balanced phrase structures—so the piano seems to speak the tune rather than simply quote it.
- Economy and clarity. Compared with showier concert variations by later virtuosi, Mozart’s transformations are short and cleanly articulated. Each variation tends to present one principal idea—rhythmic animation, register play, figural filigree—so that the set progresses as a sequence of sharply contrasted panels.
- A study in touch and articulation. Because the work is small in scale, it rewards attention to the subtleties of eighteenth-century keyboard playing: light articulation, poised ornaments, and dynamic shading that can suggest (at least in modern performance) the contrast between a singing upper voice and an accompanying bass.
For performers, K. 398 is an excellent reminder that Mozart’s “smaller” keyboard works often sit close to improvisation in spirit: the variations can sound like a succession of inspired, freshly minted solutions to the same musical problem—how to keep the theme recognizable while making the surface endlessly renewed.
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Reception and Legacy
K. 398 has never occupied the same mainstream place as Mozart’s most familiar variation sets, but it has persisted in catalogues and editions as a representative Viennese keyboard work. Modern reference listings consistently describe it as 6 Variations in F major on the aria “Salve tu, Domine” from I filosofi immaginarii, dating it to Vienna in 1783 [3].
Its legacy today is partly pedagogical: the piece is technically approachable for advanced amateurs, yet musically demanding in precisely the ways Mozart demands most—control of line, balance between hands, and the ability to give each variation a distinct character without exaggeration.
Ultimately, the set deserves attention because it encapsulates a central Mozartian principle in miniature: the transformation of familiar material into something at once elegant and unpredictable. In a few pages, Mozart demonstrates how variation form can be not a mechanical repetition scheme, but a theatre of the keyboard—where a tune borrowed from the operatic world reappears in six quick-change costumes, always itself, and always newly imagined.
[1] IMSLP work page for Mozart: 6 Variations on “Salve tu Domine”, K.398/416e (basic data: key, scoring, sections; notes on origin from Paisiello).
[2] MozartProject.com compositions list (catalog table entry: “6 Variations on ‘Salve tu, Domine’” dated March 1783, Vienna).
[3] Wikipedia: List of solo piano compositions by Wolfgang Amadeus Mozart (entry for K. 398/416e with key, source opera, place/year).