Please help me with this music question. (Only need to pick one person)

Write a short paragraph about one of the following people or groups and describe the impact they had on medieval or Renaissance music. Support your ideas with examples. Be as specific as possible.
Options...
• Hildegard von Bingen
• Notre Dame School of composers
• Guillaume de Machaut
• Giovanni Gabrieli
• Michael Praetorius

Notre Dame School of composers    

Explanation:

The Notre-Dame school of composers refers to the group of musicians in Paris from 1160 to 1250 named after Notre-Dame Cathedral.  

An English student at the Cathedral, documented as Anonymous IV mentions Léonin and Pérotin as the proponents of Renaissance music known as ars antiqua.  Léonin was the composer of the Great Book of Organum – Magnus Liber Organi . It contains the composed music collection of Léonin and Pérotin which were to be sung at the cathedral.

Anonymous regards both Léonin and Pérotin as "the best composers of organum". Renaissance music of Notre Dam School introduced motet out of the clausula ( the most frequently used composition in the Magnus Liber Organi ). They are credited for the earliest development of Polyphony in European music drawing inspiration from sacred music in Latin. It was introduced for the cathedral which paved way for modern music. Hence, The Notre Dame of School of composers built the modern edifice of music starting from the Renaissance music in Europe.

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