mid-14th century; also Egidius de Murino or Magister Frater Egidius) was a French music theorist of medieval music,[1] known for the short treatise De motettis componendis.
[2] He possibly was an Augustinian friar, as in a miniature illumination he is titled Magister Egidius Augustinus.
Along with "Guilelmus de Francia", he was probably a friar at the Monastery of Santo Spirito in Florence.
[4][5] Egidius was also the author of De modo componendi, a theoretical guide to motet writing.
No composition can be certainly attributed to him, although he is potentially identifiable with another Egidius, a composer found in the Chantilly Codex.