Who convinced the Council of Trent to allow polyphony in Mass settings?

Giovanni Pierluigi da Palestrina, an Italian composer, helped convince the Council of Trent to allow polyphony in Mass settings through his compositions that demonstrated the beauty and clarity of polyphonic music in sacred settings. His works were seen as a successful balance between the rich harmonies of polyphony and the clarity of the text, addressing concerns raised by the Council regarding the intelligibility of the sacred texts during Mass.