The Western Canon
"Tuba sacre fidei" and other motets
These motets are mong the earliest musical works to employ developments of the Ars Nova, including isorhythm. De Vitry was the greatest innovator of Ars Nova and isorhythm, and was lauded during his day as one of the era's greatest musicians.
Phillippe de Vitry
Tuba sacre fidei / In arboris empiro prospere / Virgo sum