3. •First-known significant composer
of organum
•Organum = the earliest
polyphonic music, based on
Gregorian chant
•Style came to be known as
“Notre Dame Polyphony” (florid
organum with a sense of meter)
4. •Leonin was the first to develop
“modal notation” to symbolize
rhythm, which laid the basis for
notation as we know it.
•Composed “Magnus Liber” (a
book of organum)
•His work was improved and
expanded by Perotin, one of his
students.