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Cyclopedia of Biblical, Theological and Ecclesiastical Literature
Muris, Jean de
a learned French ecclesiastic who flourished in the first half of the 14th century (about 1310-45), is noted as the author of a valuable treatise on music, which is entitled Speculum Musicae. An abridgment of this work was also published.
These files are public domain.
McClintock, John. Strong, James. Entry for 'Muris, Jean de'. Cyclopedia of Biblical, Theological and Ecclesiastical Literature. https://www.studylight.org/encyclopedias/eng/tce/m/muris-jean-de.html. Harper & Brothers. New York. 1870.
the Second Week of Advent