Who brought polyphonic music into the christian church?

Polyphonic music arose from old chants in the Organa by Leonin and Perotin in Paris

The linear perspective changed the quality of art because it gave art a sense of reality. it gave the illusion that the background and surroundings were actually close and/or far and a sense of depth. linear perspective change the quality of art following its birth the renaissance period as they want the art to be more realistic and they believe one way to achieve it is to use the method of linear perspective. it uses the principle of math to realistically portray space and depth in art. 

  paul cezanne's paintings inspired picasso to experiment with perspectives and begin cubism with george braque.hope this