Marius Casadesus
Illustration — Société des Instruments Anciens fondée en 1901 par Henri Casadesus. Postcard showing Henri, Marius, Lucette, & Régine Casadesus, and M. Bibliothèque nationale de France. Marius Casadesus (24 October 1892 – 13 October 1981) was a French violinist and composer.
Marius Casadesus

Unattributed · Bibliothèque nationale de France · Public domain
- Full name
- Marius Robert Max Casadesus.
- Born
- 1892. · 18th arrondissement of Paris.
- Died
- 1981. · Suresnes.
- Nationality
- France.
- Occupation
- composer, violinist and musician.
- Movements
- classical music.
- Education
- Conservatoire de Paris.
- Languages
- French.
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Illustration — Société des Instruments Anciens fondée en 1901 par Henri Casadesus. Postcard showing Henri, Marius, Lucette, & Régine Casadesus, and M. Bibliothèque nationale de France. Marius Casadesus (24 October 1892 – 13 October 1981) was a French violinist and composer.
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wikidata · Q784588 · wikipedia · Marius Casadesus
In this article
Identity and origins
Identity and origins
He was the brother of Henri Casadesus, uncle of the famed pianist Robert Casadesus, and grand-uncle to Jean Casadesus. Casadesus achieved perhaps his greatest fame (or notoriety) through his association with the Adélaïde Concerto attributed to Mozart. This concerto was published in 1933 in a piano transcription under Mozart's name, with Casadesus as "editor." Many music scholars believed in its authenticity, and Yehudi Menuhin made a recording of the concerto. It was even given a place in the Köchel-Verzeichnis (the standard catalog of Mozart's works), albeit as "K. 294a." ("Anh." denotes "Anhang" or "appendix" to the catalog.) However, Mozart expert Alfred Einstein's doubts about this piece were confirmed when Casadesus later admitted his authorship in court in 1977 during a copyright dispute. Casadesus' brother Henri was also a noted author of musical hoaxes, such as "Handel's Viola concerto in B minor" and "J.C. Bach's Viola Concerto in C minor." Casadesus is also known for having given the first recital of Ravel's "Tzigane" in the presence of the composer in Barcelona.
Marius Casadesus was recorded at birth as Marius Robert Max Casadesus. His recorded language was French. He was the child of Luis Casadesus and Mathilde Sénéchal-Casadesus. He married Lucette Laffite. 3 children are recorded: Mathilde Casadesus, Martine Casadesus and Gréco Casadesus.
Life and career
Dated record
Life and career
The full dated record · 2 entries
1892
Marius Casadesus born at 18th arrondissement of Paris.
1981
Marius Casadesus died at Suresnes.
Places
Named by the record
Places
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18th arrondissement of Paris.
Birth place
Suresnes.
Death place
Citations
References
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reference work
Wikidata, structured authority record Q784588: Marius CasadesusWikimedia Foundation
Secondary witnessreference work
Secondary witness
The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 18 August 2026.
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