Belgian revolution

The opera was chosen for a performance at the Théâtre de la Monnaie in Brussels on 25 August 1830, as part of King William I's festival in celebration of the 15th year of his reign. The opera would cap the three-day festival of fireworks, feasts, and processions. William I had been present at the Brussels premiere of the opera in 1829, and it enjoyed several successful performances in the city. When nationalist disturbances occurred during a performance around the time of the July Revolution in Paris, the opera was temporarily banned. The ban was lifted for the 25 August performance.^[7]

The king's festival announcement was met with open plans for revolt. Posters were put up around Brussels that advertised, "Monday, the 23rd, fireworks; Tuesday, the 24th, illuminations; Wednesday, the 25th, revolution."^[8] However, the king's only concession to public safety was to cancel the fireworks and procession on the final night, which left Auber's opera as the last public event in the king's honor. Though the subject of the opera is revolution, its role in the riots may have been more a marriage of convenience because the rebels had pre-ordained the final day of the festival as the start of the Belgian Revolution.^[9]

Prior to the performance of Auber's opera, the Courrier des Pays-Bas [fr] newspaper issued a coded call for attendees to leave prior to the fifth act.^[10] There are some disagreements about when in the opera the exodus actually began, but the most commonly cited moment is the second act duet "Amour sacré de la patrie".^[11] One contemporary account describes what happened in the theater during the duet:

When Lafeuillade and Cassel began singing the celebrated duet. "Amour sacre de la patrie" enthusiasm exploded irresistibly and [the singers] found it necessary to start afresh in the midst of the cheering. Finally, when Masaniello (Lafeuillade) launched into his entreaty, the invocation Aux armes!, the public could no longer be restrained. They acclaimed aria and actor, they booed the fifth act in order to stop the performance, and the delirious crowd [hurled itself] out of the hall—into history. Welcomed by the other crowd which waited outside, it joined in the demonstrations which loosed the revolution of 1830.^[12]

Act 1

The square before a chapel

We witness the wedding of Alfonso, son of the Viceroy of Naples, with the Spanish Princess Elvire. Alfonso, who has seduced Fenella, the Neapolitan Masaniello's mute sister and abandoned her, is tormented by doubts and remorse, fearing that she has committed suicide. During the festival Fenella rushes in to seek protection from the viceroy, who has kept her a prisoner for the past month. She has escaped from her prison and narrates the story of her seduction by gestures, showing a scarf which her lover gave her. Elvire promises to protect her and proceeds to the altar, Fenella vainly trying to follow. In the chapel Fenella recognizes her seducer in the bridegroom of the Princess. When the newly married couple come out of the church, Elvire presents Fenella to her husband and discovers from the mute girl's gestures, that he was her faithless lover. Fenella flees, leaving Alfonso and Elvire in sorrow and despair.

Act 2

On the beach

The fishermen, who have been brooding in silence over the tyranny of their foes, begin to assemble. Pietro, Masaniello's friend, has sought for Fenella in vain, but at length she appears of her own accord and confesses her wrongs. Masaniello is infuriated and swears to have revenge, but Fenella, who still loves Alfonso, does not mention his name. Then Masaniello calls the fishermen to arms and they swear perdition to the enemy of their country.

Act 3

The Naples marketplace

People go to and fro, selling and buying, all the while concealing their purpose under a show of merriment and carelessness. Selva, the officer of the viceroy's body-guard, from whom Fenella has escaped, discovers her and the attempt to re-arrest her is the sign for a general revolt, in which the people are victorious.

Act 4

Masaniello's house

Fenella comes to her brother's dwelling and describes the horrors, which are taking place in the town. The relation fills his noble soul with sorrow and disgust. When Fenella has retired to rest, Pietro enters with comrades and tries to excite Masaniello to further deeds, but he only wants liberty and shrinks from murder and cruelties.

They tell him that Alfonso has escaped and that they are resolved to overtake and kill him. Fenella, who hears all, decides to save her lover. At this moment Alfonso begs at her door for a hiding-place. He enters with Elvire, and Fenella, though at first disposed to avenge herself on her rival, pardons her for Alfonso's sake. Masaniello, reentering, assures the strangers of his protection and even when Pietro denounces Alfonso as the viceroy's son, he holds his promise sacred. Pietro with his fellow-conspirators leaves him full of rage and hatred.

Meanwhile, the magistrate of the city presents Masaniello with the royal crown and he is proclaimed king of Naples.

Act 5

Before the Viceroy's palace

In a gathering of fishermen, Pietro confides to Moreno that he has administered poison to Masaniello, in order to punish him for his treason, and that the king of one day will soon die. While he speaks, Borella rushes in to tell of a fresh troop of soldiers, marching against the people with Alfonso at their head. Knowing that Masaniello alone can save them, the fishermen entreat him to take the command of them once more and Masaniello, though deadly ill and half bereft of his reason, complies with their request. The combat takes place, while an eruption of Vesuvius is going on. Masaniello falls in the act of saving Elvire's life. On hearing these terrible tidings Fanella rushes to the terrace, from which she leaps into the abyss beneath, while the fugitive noblemen take again possession of the city.^[19]