During Palestrina’s lifetime, the Council of Trent met to discuss a response to the Reformation. Legend says that Palestrina saved polyphony (music with more than one voice part of equal importance) from condemnation by the church council when he composed his Pope Marcellus Mass. The council had been concerned about the lack of clarity in polyphonic texts. The Pope Marcellus Mass was a beautiful work that displayed the words in an intelligible manner. Whether this legend is true or not, we do not know. What we do know, however, is that the Council of Trent ordered changes to the liturgy and Palestrina was one of the men assigned to revising old chant books.