Sinigaglia is presented as the decisive setting for Cesare Borgia’s stratagem against the Orsini leaders and their allies. The place embodies the transition from unstable dependence on foreign and mercenary forces to concentrated princely control: by drawing his opponents into his hands there, Cesare Borgia secured the political foundations of his power in Romagna and the Duchy of Urbino, while also bringing Oliverotto da Fermo’s violent career to its end.

Setting and Political Context

Sinigaglia appears within the wider struggle through which Cesare Borgia sought to consolidate the territories he had acquired. After taking Romagna, suppressing the Colonnesi, capturing Faenza, and seizing the Duchy of Urbino, he became increasingly distrustful of the forces on which his expansion had depended. The Orsini had assisted him but were reluctant to support further enterprises, and France had already prevented him from advancing against Tuscany. These limits persuaded him that a ruler who relied on the arms or fortune of others could not possess secure authority.

Cesare Borgia therefore weakened the factions of the Orsini and Colonnesi by drawing well-born followers into his own service. He made them his gentlemen, provided them with generous allowances, and assigned them offices and commands appropriate to their rank. Within a few months, their former partisan loyalties had faded and their hopes had come to rest on the Duke alone. This transformation prepared the political ground for the action at Sinigaglia: the followers of the opposing faction were being separated from its chiefs before the chiefs themselves were struck.

The Orsini Stratagem

The Orsini eventually recognized that the growing power of Cesare Borgia and the Church threatened their destruction. They assembled a council at Magione in the territory of Perugia, and the meeting produced the revolt of Urbino, disturbances in Romagna, and grave dangers for the Duke. Cesare Borgia overcame these dangers with French assistance, but, once his credit had been restored, he no longer wished to depend on France or any other foreign power.

Rather than confront the Orsini openly, Cesare Borgia turned to deception. He concealed his intentions so effectively that the faction’s leaders were persuaded to trust the mediation of Paolo. Cesare Borgia secured Paolo through sustained personal attention, supplying him with clothes, money, and horses. These gifts were not merely gestures of reconciliation; they helped create the appearance of friendship that drew the Orsini leaders toward Sinigaglia. Once they entered the Duke’s reach, the leaders were disposed of and their followers were won over.

The result was more than a successful ambush. By removing the factional chiefs while absorbing or neutralizing their adherents, Cesare Borgia eliminated the principal internal obstacle to his authority. He held Romagna together with the Duchy of Urbino and had gained the confidence of the populations of those States, who had begun to regard his rule as beneficial. Sinigaglia thus functioned as the violent hinge between factional resistance and a more centralized political order.

Oliverotto da Fermo and the End of His Rule

Oliverotto da Fermo was caught at Sinigaglia along with the Orsini and Vitelli leaders. His presence there linked the location to a separate but parallel history of seizure and betrayal. Oliverotto had taken control of Fermo through a carefully staged banquet at which he murdered his uncle Giovanni Fogliani and the city’s leading citizens. He then rode through the streets, besieged the chief magistrate in the palace, and compelled the city to accept him as its ruler.

For a year, Oliverotto maintained a firm hold over Fermo and became formidable to his neighbors. He killed those whose disaffection might obstruct him and reinforced his position with new civil and military ordinances. His government therefore rested on the same combination of sudden violence, intimidation, and institutional consolidation that the book examines elsewhere in relation to Cesare Borgia and Agathocles of Syracuse.

That authority ended when Cesare Borgia overreached him at Sinigaglia. Oliverotto was captured there one year after his parricidal crime and strangled together with Vitellozzo Vitelli, whom he had adopted as his master in villainy as well as in courage. The location consequently marks both the culmination of Oliverotto’s temporary princely power and the punishment that followed his method of acquiring it.

Strategic and Political Significance

The events at Sinigaglia illustrate the book’s distinction between dependence and self-command. Cesare Borgia had first entered Romagna with French auxiliary troops, then employed mercenaries from the Orsini and Vitelli, and finally raised forces of his own when the earlier supports proved fickle, false, and treacherous. His reputation increased as he became more visibly the sole master of his forces. The operation at Sinigaglia belongs to this larger movement toward autonomous power: diplomacy and stratagem replaced an open dependence on potentially disloyal arms.

Sinigaglia also demonstrates how political violence is judged by its timing and consequences. The action removed dangerous leaders at a moment when their faction threatened revolt, while their followers were simultaneously incorporated into the Duke’s political order. In the book’s analysis, the effectiveness of such conduct lies not simply in cruelty but in whether decisive violence is used to secure the state and followed by measures that make government stable. Sinigaglia is therefore remembered not as an isolated act of treachery, but as the moment in which Cesare Borgia converted a precarious conquest into a stronger foundation for rule.