Pérotin
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Pérotin was a composer associated with the Notre Dame school of polyphony in Paris and the broader ars antiqua musical style of high medieval music. He is credited with developing the polyphonic pract
Notre-Dame and the rest of Paris in the background of a c. 1452–1460 illuminated manuscript by Jean Fouquet
Pérotin's monophonic Beata viscera from Wolfenbüttel 1099 (W2) MS
Perotin Alleluia nativitas
Léonin
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Léonin was the first known significant composer of polyphonic organum. He was probably French, probably lived and worked in Paris at the Notre-Dame Cathedral and was the earliest member of the Notre D
Pérotin
…in Paris and the broader ars antiqua musical style of high medieval music. He is credited with developing the polyphonic practices of his predecessor Léonin, with the introduction of three and four-part harmonies. Other than a brief mention by music theorist Johannes de Garlandia in his De Mensurabili Musica…
Organum over the solo verse «Voce quippe de celo» of the responsorium prolixum for Saint Nicholas (6 December) in the appendix of the Vatican organum treatise (V-CVbav Ottob. lat. 3025, f.49v)