The Notre Dame school was born in the 12th century and developed until the mid-13th century; linked to the Notre Dame Cathedral in Paris, it represents the first stylistic synthesis of Polyphony.
According to an anonymous treatise from 1300, the chapel masters LEONINUS and PEROTINUS, active in the second half of the 12th century, are the authors of the “MAGNUS LIBER ORGANI DE GRADUALI ET CENTIFONARIO,” which is the liturgical polyphonic repertoire performed by the Notre Dame choir.
The Notre Dame School introduced, starting from the 12th century, a practical system of square notation and its groupings of 2 to 5 notes called “LIGATURES.” Rhythms are ordered according to various groupings called modes and are based on the succession of long and short values; the groupings are highlighted by 6 rhythmic modes:
I°: TROCHEE
II°: IAMB
III°: DACTYL
IV°: ANAPEST
V°: MOLOSS
VI°: TRIBRAC
https://www.repubblica.it/…/incendio_notre_dame_parigi_cat…/
Adieu
https://www.youtube.com/watch?v=8e6LZi5ysbY
https://www.youtube.com/watch?v=9KGseW60oaA
