FTP, name this 16th century composer of the Roman School, best  known for his Pope Marcellus Mass.
Like Thomas Tallis, he produced some Lamentations of Jeremiah the Prophet , though he resigned afterwards in protest of the way choirboys were fed. His Mottetorum liber secundus includes motets by his brother and two sons, two of his 250 motets, an early book of which was dedicated to Pope Julius III and resulted in his admittance to the Cappella  Sistina. His most famous work, for six voices, demonstrated that the mass could be intelligible in the context of  polyphony and was submitted to the Council of Trent. FTP, name this 16th century composer of the Roman School, best  known for his Pope Marcellus Mass.
Like Thomas Tallis, he produced some Lamentations of Jeremiah the Prophet , though he resigned afterwards in protest of the way choirboys were fed.
Giovanni Pierluigi da Palestrina