during a little less than a century, Christian world had eyes turned(shot) to Avignon, because French popes domiciled(resided) there from 1309. His(Her,Its) treasures, his(her,its) pomps, his(her,its) places of power attracted to it the kings, the princes and the biggest(greatest) artists of the century. Within Curie, " the papal chapel " is an institution gathering(collecting) from now on the best cantors and compositors of the Western world, whom the pope does not hesitate to recruit in the big(great) cathedrals or princely courts(yards), often coming from the north of France. The talents of this "Cantores" are going to practice(be applied) in the new kind(genre) of polyphonic mass and in the great(tremendous) ground of experimentation that the anthem is, making triumph in a brilliant way the polyphony and the audacious(adventurous) stylistic novelties of Ars Nova. Programme is a route(course) among the big(great) manuscripts born in the sphere from Avignon and contains many rooms(parts,plays) which were not any more sung for the XIVth century, in an interpretation(performance) very close to that of the papal chapel of Avignon.