Until recently it was believed that Masaniello was a native of Amalfi, when in fact he was born in Vico Rotto al Mercato, one of the many lanes around the market square in Naples.
In 1896, the poet Salvatore Di Giacomo resolved the confusion around Masaniello and Amalfi by transcribing the act of baptism found in the Church of Santa Caterina which cites: "On June 29, 1620 Tommaso Aniello son of Cicco d'Amalfi and Antonia Gargano was baptized by me Don Giovanni Matteo Peta, and lifted from the sacred font by Agostino Monaco and Giovanna de Lieto in Vico Rotto.
It housed stalls selling all manner of goods, it was where acrobats performed for the common people and, in the days of Conrad of Swabia, had been the place for public executions.
To support the war effort, the Iberian Crown imposed a heavy tax burden on the Viceroy of Naples in order to restore the coffers of its vast empire, whose Golden Age was inevitably coming to an end.
Masaniello, a fisherman and fishmonger like his father, was described by his contemporaries as: ...a young man of twenty-seven, beautiful and graceful in appearance, his face was brown and somewhat burned by the sun: black eyes, blond hair, with locks that ran down his neck.
He worked mainly for the feudal nobility, including the Marchesa di Brienza and don Diomede Carafa, Duke of Maddaloni, who treated him almost like a slave.
During a stay in prison, he met the "Grand Admiral" and Doctor of Law Marco Vitale, the illegitimate son of a famous lawyer, who brought him into contact with some members of the middle class tired of the continuing abuses of the tax collector and privileges of the nobility.
In 1619, during the term of office of Viceroy Don Pedro Téllez-Girón, 3rd Duke of Osuna, Genoino had been called twice to represent the interests of the people against the nobility, essentially playing the role of an ancient tribune.
Masaniello attempted to discipline the mob and restrain its destructive instincts, and to some extent he succeeded; attired in his fisherman's garb, he gave audiences and administered justice from a wooden scaffolding outside his house.
Several rioters, including the Duke of Maddaloni, an opponent of the viceroy, and his brother Giuseppe Caraffa, who had come to Naples to make trouble, were condemned to death by him and executed.
The mob, which every day obtained more arms and was becoming more intractable, terrorized the city, drove off the troops summoned from outside, and elected Masaniello "captain-general"; the revolt was even spreading to the provinces.
The astute Duke of Arcos then invited Masaniello to the palace, confirmed his title of "captain-general of the Neapolitan people," gave him a gold chain of office, and offered him a pension.
The Viceroy gave way, but the nobles of Naples were resistant: there was an attempt to assassinate Masaniello, but then on 13 July, dressed in finery and a golden chair, he was confirmed Captain-General in a solemn ceremony in the cathedral.
But the next day the populace, angered by the alteration of the measures for weighing bread, repented of its insane fury; the body of Masaniello was dug up and given a splendid funeral, at which the viceroy himself was represented.