Two composers from this country, (*) Perotin and Leonin, wrote organa, which are the earliest notated polyphonic compositions in Western music.
Modal notation was developed in this modern-day country in the 12th century as a means of notating rhythm. Though probably not originally from this country himself, Anonymous IV was an important source about two composers from here whose pieces are compiled in the Magnus Liber. A 1722 theory treatise from this country introduced the concept of viewing six and six-four chords as inversions of triads rooted in a "fundamental bass". Two composers from this country, (*) Perotin and Leonin, wrote organa, which are the earliest notated polyphonic compositions in Western music. The style of one composer from this country was opposed by supporters of Pergolesi's opera buffa in the War of the Buffoons. That composer from here wrote such "lyric tragedies" as Hippolytus and Aricia and Castor and Pollux. For 10 points, name this country of origin of Jean-Philippe Rameau and of the composers of the Notre Dame School.
Modal notation was developed in this modern-day country in the 12th century as a means of notating rhythm.
France