Léonin (also Leoninus, Leonius, Leo) (fl. 1150s — d. ? 1201) 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 Pérotin (fl. c. 1200, died 1205 or 1225),[1] also called Perotin the Great, was a European composer, believed to be French, who lived around the end of the 12th and beginning of the 13th century. SO I WOULD SAY ITS D.FRANCE
