Iacobus de Ispania
Iacobus de Ispania (James of Hesbaye; died after 1330) was a Franco-Flemish music theorist, the author of The Mirror of Music (Latin: Speculum musicae) during the second quarter of the 14th century. Before the discovery of his full name, scholars designated him Jacques de Liège (Latin: Iacobus Leodiensis).
The Speculum musicae, the longest surviving medieval work on music, was previously attributed to Jean de Muris by Edmond de Coussemaker, until it was discovered that the initial letters of each of the seven chapters of the book spell out the acrostic IACOBUS. Further research associated him with the diocese of Liège, and suggested that he studied in Paris in the late 13th century before returning to Liège to complete the final two books of his treatise. Smits van Waesberghe associated him with Iacobus de Oudenaerde, professor at the University of Paris and canon of Liège, while he has also been identified with the Iacobus de Montibus mentioned in another manuscript.
The discovery of an attribution of the Speculum to a Iacobus de Ispania initially suggested that the author had come from Spain (Latin: Hispania), possibly identifying him with a James of Spain known to have worked in Oxford in the 14th century, suggesting that the connection with Liège was spurious. Further research demonstrated that Ispania more likely refers to Hesbaye, and brought forward further evidence of the author's association with Liège.
- Frederick Hammond & Oliver B. Ellsworth. "Jacobus of Liège". In L. Root, Deane. Grove Music Online. Oxford Music Online. Oxford University Press. (subscription required)
- Desmond, Karen (2000). "New light on Jacobus, Author of Speculum musicae". Plainsong & Medieval Music. 9 (1): 19–40. ISSN 0961-1371. doi:10.1017/s0961137100000024.
- Bent, Margaret (2015). Magister Jacobus de Ispania, author of the Speculum musicae. Royal Musical Association monographs. Farnham, Surrey: Ashgate. ISBN 978-1-4724-6094-3.
- Wegman, Rob C. (2016). "Jacobus de Ispania and Liège". Journal of the Alamire Foundation. 8.
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