- Nun schwanden vor dem heiligen Strahle by Brockes, Barthold Heinrich
- Nun schwanden vor dem heiligen Strahle by Haydn, Franz Joseph
- Nun sei bedankt, mein lieber Schwan by Wagner, Richard
- Nun sei bedankt, mein lieber Schwan! by Wagner, Richard
- Nur eine Waffe taugt by Wagner, Richard
- Nur eine Waffe taugt by Wagner, Richard
- O amore, o bella luce del core by Daspuro, Nicola
- O amore, o bella luce del core by Mascagni, Pietro
- Ô blonde Cérès by Berlioz, Hector
- Ô blonde Cérès by Berlioz, Hector
- O Colombina, il tenero fido Arlecchin by Leoncavallo, Ruggiero
- O Colombina, il tenero fido Arlecchin by Leoncavallo, Ruggiero
- O del ben che acquisterò by Sbarra, Francesco
- O del ben che acquisterò by Cesti, Antonio
- O diese Sonne! by Wagner, Richard
- O diese Sonne! by Wagner, Richard
- O König, das kann ich dir nicht sagen by Wagner, Richard
- O König, das kann ich dir nicht sagen by Wagner, Richard
- O Lola ch’ai di latti la cammisa by Targioni-Tozzetti, Giovanni
- O Lola ch’ai di latti la cammisa by Mascagni, Pietro
- Ô lumière de Troie! by Berlioz, Hector
- Ô lumière de Troie! by Berlioz, Hector
- O mio castel paterno… Nell’argilla maledetta by Maffei, Andrea
- O mio castel paterno… Nell’argilla maledetta by Verdi, Giuseppe
- O mio piccolo tavolo ingombrato by Leoncavallo, Ruggiero
- O mio piccolo tavolo ingombrato by Leoncavallo, Ruggiero
- Ô nature pleine de grâce by Massenet, Jules
- Ô nature pleine de grâce by Milliet, Paul
- Ô nature pleine de grâce by Grémont, Henri
- Ô nature pleine de grâce by Blau, Édouard
- Ô paradis sorti de l’onde by Scribe, Eugène
- Ô paradis sorti de l’onde by Meyerbeer, Giacomo
- Ô paradis sorti de l’onde by Fétis, François-Joseph
- Ô souverain, ô juge, ô père by Gallet, Louis
- Ô souverain, ô juge, ô père by Blau, Édouard
- Ô souverain, ô juge, ô père by Massenet, Jules
- Ô souverain, ô juge, ô père by d’Ennery, Adolphe
- O tu che in seno agli angeli by Piave, Francesco Maria
- O tu che in seno agli angeli by Verdi, Giuseppe
- O Walther, der du also sangest by Wagner, Richard
- O Walther, der du also sangest by Wagner, Richard
- O wie ängstlich, o wie feurig by Stephanie der Jüngere, Johann Gottlieb
- O wie ängstlich, o wie feurig by Mozart, Wolfgang Amadeus
- O Wolfram, der du also sangest by Wagner, Richard
- O Wolfram, der du also sangest by Wagner, Richard
- Odi il voto, o grande Iddio by Piave, Francesco Maria
- Odi il voto, o grande Iddio by Verdi, Giuseppe
- Oh, Gentlemen, Listen, I Pray by Gilbert, William Schwenck
- Oh, Gentlemen, Listen, I Pray by Sullivan, Sir Arthur
- Or sono sei mesi by Civinini, Guelfo
- Or sono sei mesi by Puccini, Giacomo
- Or sono sei mesi by Zangarini, Carlo
- Ora e per sempre addio by Boito, Arrigo
- Ora e per sempre addio by Verdi, Giuseppe
- Oui, ta voix m’inspire by Royer, Alphonse
- Oui, ta voix m’inspire by Donizetti, Gaetano
- Pastorello d’un povero armento by Haym, Nicola Francesco
- Pastorello d’un povero armento by Händel, Georg Friedrich
- Peccator videbit by Vivaldi, Antonio
- Peccator videbit – Vivaldi by Anonymous Latin Texts
- Pegno adorato e caro by Ferretti, Jacopo
- Pensa che sei mia figlia by Rossi, Gaetano
- Pensa che sei mia figlia by Rossini, Gioachino
- Per me rispondete by Metastasio, Pietro
- Per me rispondete by Mozart, Wolfgang Amadeus
- Per pietà, non ricercate by Mozart, Wolfgang Amadeus
- Per pietà, non ricercate by Anonymous Italian Poets
- Pietoso al lungo pianto… Deh, lasciate a un’alma amante by Romani, Felice
- Pietoso al lungo pianto… Deh, lasciate a un’alma amante by Verdi, Giuseppe
- Plus blanche que la blanche hermine by Scribe, Eugène
- Plus blanche que la blanche hermine by Meyerbeer, Giacomo
- Plus blanche que la blanche hermine by Deschamps, Émile
- Por el humo se sabe by Fernández Shaw, Guillermo
- Por el humo se sabe by Vives, Amadeo
- Por el humo se sabe by Romero Saráchaga, Federico
- Posez dans son écrin by Massenet, Jules
- Posez dans son écrin by Cain, Henri
- Pour me rapprocher de Marie by Bayard, Jean-François Alfred
- Pour me rapprocher de Marie by Vernoy de Saint-Georges, Jules-Henri
- Pour me rapprocher de Marie by Donizetti, Gaetano
- Pour mon âme by Vernoy de Saint-Georges, Jules-Henri
- Pour mon âme by Donizetti, Gaetano
- Pour mon âme by Bayard, Jean-François Alfred
- Pourquoi me réveiller by Blau, Édouard
- Pourquoi me réveiller by Massenet, Jules
- Pourquoi me réveiller by Milliet, Paul
- Pourquoi me réveiller by Grémont, Henri
- Preist der Erlösers Güte by Beethoven, Ludwig van
- Preist des Erlösers Güte by Huber, Franz Xaver
- Prigioniera ho l’alma in pena by Haym, Nicola Francesco
- Prigioniera ho l’alma in pena by Händel, Georg Friedrich
- Quale più fido amico by Solera, Temistocle
- Quale più fido amico by Verdi, Giuseppe
- Quando il cor da lei piagato by Donizetti, Gaetano
- Quando il cor da lei piagato by Cammarano, Salvatore
- Quando le sere al placido… L’ara, o l’avello apprestami by Cammarano, Salvatore
- Quando le sere al placido… L’ara, o l’avello apprestami by Verdi, Giuseppe
- Quanto è bella, quanto è cara by Donizetti, Gaetano
- Quanto è bella, quanto è cara! by Romani, Felice
- Que les destins prospères by Scribe, Eugène