Jongleurs et des Bourgeois d’Arras. He is sole author of seven lyrics but is known
primarily for his jeux-partis, of which he co-composed over ninety. His preferred partners
in these compositions include Adam de la Halle, Jean de Grieviler, and Lambert Ferri.
Wendy E.Pfeffer
[See also: JEU-PARTI; PUY;]
Jehan Bretel. “Les chansons de Jean Bretel,” ed. Gaston Raymond. Bibliothèque de l’École des
Chartes 41(1880):195–214.
Långfors, Arthur, Alfred Jeanroy, and Louis Brandin, eds. Recueil général des jeux-partis français.
2 vols. Paris: Champion, 1926, Vol. 1, pp. 86–356.
JEHAN DE PARIS, ROMAN DE
. Two manuscripts (B.N. fr. 1465 and Louvain G 54) contain this prose romance (ca.
1495) inspired by Philippe de Beaumanoir’s Jehan et Blonde. The anonymous author
recounts the success of the King of France over the King of England, as both seek the
hand of a Spanish princess. The text, written in Lyon, contains references to the marriage
of Charles VIII and Anne of Brittany.
Wendy E.Pfeffer
Wickersheimer, Edith, ed. Le roman de Jehan de Paris. Paris: Champion, 1923.
JEHAN DES MURS
(Johannes de Muris; ca. 1300-ca. 1350). Jehan was one of the most important music
theorists of the later Middle Ages. His works on musical proportion and mensural
notation remained authoritative for two centuries and were more widely distributed than
those of any other theorist after 1200. Jehan’s works on mathematics and astronomy,
such as the Opus quadripartitum numerorum, were less influential than his musical
writings. Considerable doubt remains as to the titles and authentic versions of Jehan’s
works. Four treatises are almost certainly authentic, all dating from the 1320s. The Ars
nova musice (or Notitia artis musice) of 1321 stresses in its first part that only the theorist
has sufficient wisdom to teach. The second book of the Ars nova, entitled Musica
practica, discusses musical time, measurement, and nota tion. The Quaestiones super
partes musice (or Compendium musicae practicae) is based largely on the Ars nova. The
third work, Musica speculativa secundum Boetium, is notable for its mathematical
methods, such as the use of theorems, in the study of music and became a standard
textbook in eastern European universities in the 14th and 15th centuries. Other texts
attributed to Jehan include the Libellus cantus mensurabilis, written for a nonacademic
audience, and the Ars contrapuncti. The form, terminology, and theories of Jehan’s
writings were widely adopted by later writers. Jehan himself built on the style of Franco
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