1) Composer 2) German-language opera 3) artist from Italy 4) Missa Papae Marcelli composer 5) Opera set in Italy 
[opera] Palestrina is an opera by the German composer Hans Pfitzner, first performed in 1917. The composer referred to it as a Musikalische Legende (musical legend), and wrote the libretto himself, based on a legend about the Renaissance musician Giovanni Pierluigi da Palestrina, who saves the art of contrapuntal music (polyphony) for the C...
(from the article `opera`) ...composed several operas of melodically long-lined, subjective, at times mystical content that have not often reached beyond the German-speaking ...
[n] - Italian composer (1526-1594)
Giovanni Pierluigi da Palestrina noun Italian composer (1526-1594)