Pope Gregory I - first to collect Gregorian Chant
(musical selection: Gregorian Chant - "Haec dies")
Idea of two melody lines sung simultaneously developed in the Cathedral of
Notre Dame, Paris
(musical selection: Notre Dame School - "Haec dies")
Non-sacred, or secular, music did exist, but was not written down until after the tenth century. This music spread throughout Europe by troubadours and trouvères