Flute Concerto (lost or unrealised), K. 673
di Wolfgang Amadeus Mozart
Mozart’s Flute Concerto (K. 673) is a lost or possibly unrealised work associated with his Mannheim–Paris journey of 1777–1778, when he was 21. No score or parts are known to survive, and the concerto is known only from catalogue-level documentation.
What Is Known
The Köchel Verzeichnis lists K. 673 as a Concerto for flute and orchestra, marked “lost or not realized,” and dated to Mannheim/Paris (1777–1778) [1]. No autograph manuscript, copies, or performing materials are currently identified, so its key, scoring details beyond “flute and orchestra,” and even the extent of completion cannot be verified.
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In context, the dating places the entry alongside Mozart’s push to secure work in Mannheim (with its celebrated orchestra) and his subsequent, difficult months in Paris. If K. 673 was genuinely planned, it would belong to the phase just before the extant Flute Concerto in G major, K. 313 (1778)—a separate, surviving concerto that should not be conflated with this lost listing.
Musical Content
Because no music for K. 673 is known to survive, there is nothing concrete to describe in terms of themes, movement layout, or form. At most, the catalogue wording implies the conventional late-18th-century solo-concerto concept—flute set against an orchestral ensemble—without preserving any specific musical substance [1].
[1] International Stiftung Mozarteum, Köchel Verzeichnis entry for KV 673 (“Concerto for flute and orchestra”; status: lost or not realized; dating: Mannheim, Paris, 1777–1778).