Editing Norma (opera) (section)

=== Act 1 ===
* [[Overture#19th-century opera|Sinfonia]]

==== ''Scene 1: The grove of the druids'' ====

Oroveso leads the druids in a procession in the forest to pray for victory against the invading Romans: (Oroveso and druids: "Ite sul colle, o druidi" / "Go into the hills, Druids"). The druids pray that Norma will come and have the courage to broker peace with the Romans: (Druids and Oroveso: "Dell'aura tua profetica" / "With thy prophetic aura, imbue her, O terrible God".) All leave to go to the temple.

Pollione and Flavio enter. Although Norma has secretly broken her vows in order to love him and has borne him two children, Pollione tells Flavio that he no longer loves Norma, having fallen in love with the priestess Adalgisa. But he expresses some remorse, describing his dream in which Adalgisa was beside him at the altar of Venus and a huge storm arose: (Pollione, aria: "Meco all'altar di Venere" / "With me at the altar in Rome was Adalgisa dressed in white, veiled all in white.") The storm presaged disaster for both Norma and himself: "Thus does Norma punish her faithless lover," he declares. They hear the trumpets sounding to announce Norma's arrival. Flavio urges his friend to leave, but Pollione stands firm, proclaiming that he will confront Norma and the druids with a superior power and overthrow their altars: (Cabaletta: "Me protegge, me difende" / "I am protected and defended")

{{listen|type=music
|title="Casta Diva"
|filename=Bellini Casta diva par Claudia Muzio.ogg
|description=[[Claudia Muzio]], circa 1936
}}
As Norma leads the druids and priestesses, the crowd proclaims: "Norma viene" / "Norma is coming" and, as Oroveso awaits her, they describe her dress and manner. All kneel as she approaches. "The time is not ripe for our revenge", she declares, stating that Rome will perish one day by being worn down. Then, with the mistletoe in hand, she approaches the altar with a plea to the moon (the "Chaste Goddess"): ([[cavatina]]: "Casta diva" / "Chaste goddess"). She pleads that the goddess shed upon earth the peace that she has created in heaven. She calls for all to complete the rites and then clear the uninitiated from the grove. To herself, she declares that she cannot hurt Pollione, but desires that things return to where they used to be: (Cabaletta: "Ah! bello a me ritorna" / "Return to me, O beautiful one"). The assembled crowd accepts her cautious approach, and all leave the grove.

''Later that night: The Temple of [[Irminsul]] in the grove''

Adalgisa prays at the temple, remembering with some sorrow how she became involved with Pollione. He enters, telling her that she prays to a cruel god and is not trying to invoke the god of love. As she appears to reject him, he declares (Aria: "Va crudele" /"Go, O cruel one") but he is convinced that he cannot leave her. He is distraught, and she doesn't show she is equally torn, until the moment he declares that he must return to Rome the following day. He begs Adalgisa to go with him: (Duet: Pollione, then Adalgisa, then together: "Vieni in Roma" / "Come to Rome"). She resists him, but finally agrees that they will leave together the following day.

==== ''Scene 2: Norma's dwelling'' ====
[[File:Norma-Alessandro-Sanquirico.jpg|thumb|upright=1.3|[[Alessandro Sanquirico]]'s set design for act 1, scene 2, for the original production]]
Norma appears to be upset and orders her maid, Clotilde, to take the two children away from her, expressing very ambivalent feelings about them. She tells Clotilde that Pollione has been recalled to Rome, but does not know if he will take her or how he feels about leaving his children. As Adalgisa approaches, the children are taken away.

Adalgisa tells Norma she has fallen in love with a Roman, whom she does not name. As she describes how she fell in love while waiting at the temple and seeing "his handsome face" appear, Norma recalls (as an aside) her own feelings for Pollione ("my passions, too, burned like this"), and more and more, their experiences of falling in love run parallel: (Norma and Adalgisa, duet: "Sola, furtiva al tempio" / "Often I would wait for him"). Adalgisa pleads for help and forgiveness, and Norma pledges that she will do that and will also free her from her vows as a priestess: (Norma: "Ah! sì, fa core, abbracciami" / "Yes, take heart, embrace me". Adalgisa: "Ripeti, o ciel, ripetimi" / "Say that again, heavens, say again")

Norma asks Adalgisa to describe the man whom she loves. Responding, she tells her that he is a Roman, and, at that moment, turns to indicate that it is Pollione who is just then entering the room. As Norma furiously turns to confront Pollione, Adalgisa is confused: Norma: "Oh! non tremare, o perfido" / "O faithless man, do not tremble".

Forcing the priestess to realise that she is the victim of a huge deception, Norma addresses Adalgisa. (Trio: each sings in succession, beginning with Norma: "Oh! di qual sei tu vittima" / "Oh, you are the victim"; then Adalgisa: "Oh! qual traspare orribile" / "What horror has been revealed"; then the two women together, followed by Pollione alone: "Norma! de' tuoi rimproveri" / "Norma, do not reproach me now", continuing with "Please give this wretched girl some respite"; after which all three repeat their words, singing at first individually, then together.)

There are angry exchanges among the three: Norma declaring Pollione to be a traitor, he trying to persuade Adalgisa to leave with him, and Adalgisa angrily telling him to go away. When he declares that it is his fate to leave Norma, she encourages the young priestess to go with him, but Adalgisa declares that she would rather die. Norma then demands that her lover go, leaving behind his children — and his honor. (Finale: brief duet, Adalgisa and Pollione: he declares his love, and she her desire for Norma not to be a source of guilt to her. Trio: Norma continues to rage at Pollione, Adalgisa repeats her desire to make him return to Norma, and Pollione curses the day when he met Norma.) Then the sound of the druids calling Norma to the temple is heard. They report that the angry god, Irminsul, has spoken. Pollione storms out.