with Viclinda in his custody. Arvino suddenly appears and Pagano is shocked to learn that in the darkness he has killed his father, not his brother (Orror! / "Horror! Dreadful monster of Hell..."). A throng calls for Pagano's death, but Giselda protests against more bloodshed. So Pagano is once again sent into exile. Act 2: L'uomo della Caverna Scene 1: Acciano's palace in Antioch, 1098. Acciano and representatives from surrounding territories plot their continued resistance to the marauding crusaders. They have captured Giselda, who is now held captive within Acciano's harem. Sofia, Acciano's head wife and a secret Christian, enters with her son Oronte. Oronte has fallen in love with the captive Giselda (Aria: La mia letizia infondere / "Would that I could instill my gladness into her dear heart"). As Oronte sings of his love, Sofia sees Giselda as a means of converting her son to Christianity (Come poteva un angelo / "How could Heaven create an angel so pure"). Scene 2: A cave in the desert outside Antioch A hermit waits for the arrival of the crusaders. A man appears at the cave and asks the hermit how he may receive forgiveness for his past sins. The man is Pirro, who has become a confidante of Acciano and now controls the gates of Antioch. The hermit counsels Pirro that he will achieve forgiveness if he opens the gates to the approaching crusaders. Thereafter, the crusaders, led by Arvino, appear at the cave. The hermit learns that Arvino's daughter has been captured by Acciano. The hermit assures them that they will succeed in taking Antioch. Scene 3: Acciano's harem The members of the harem sing of Giselda's luck in attracting the attentions of Oronte. As Giselda prays (Aria: Oh madre, dal cielo / "O mother, from heaven hear my lament") sudden shouts warn that the crusaders have invaded Antioch. Sofia rushes in to say that both Acciano and Oronte have been killed. Arvino enters with the hermit. Sofia identifies Arvino as the murderer of her husband and son. Giselda is horrified and recoils at her father's attempted embrace. She declares that this crusade was not the will of God. Arvino draws his sword and threatens to kill her for her blasphemy, but he is stopped by the hermit and Sofia. Arvino declares that his daughter has gone mad. Act 3: La Conversione Scene 1: The valley of Jehoshaphat; Jerusalem