Conspiration des poignards

• 1. Introduction

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  The Conspiration des poignards, or Dagger Conspiracy, centres on a single night in Paris: the 10th of October 1800, when Napoleon Bonaparte was said to have nearly been killed leaving the opera. Four men reportedly waited with weapons outside the Paris opera house after a performance of Les Horaces. The police force of Joseph Fouché stepped in and arrested Diana, Ceracchi, and two accomplices before any attack could be carried out. Four conspirators were condemned to death within months.

  But almost from the moment the story was told, people questioned whether it was entirely true. The plot raises a knot of questions that cut to the heart of how power works. Was this a real assassination attempt, or a trap? Who decided which men would die, and why? And what does the conspiracy reveal about the ruthless machinery of the Napoleonic police state in its earliest days?

• 2. The Night at the Opera

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  Les Horaces was playing at the Paris opera house on the evening of the 10th of October 1800. According to the official version, four armed men had positioned themselves to strike Napoleon as he left the building after the performance. Fouché's police moved first. They stopped Joseph Diana and Giuseppe Ceracchi on the spot, along with two of their companions. The remaining conspirators, the story went, fled and were picked up later at their homes.

  The date in the French Republican calendar was 18 vendémiaire, year IX. The timing mattered politically. Napoleon had been First Consul of France for less than a year, having seized power in the coup of 18 Brumaire the previous November. An assassination attempt, intercepted and neutralised, could only burnish his image as a leader protected by providence and a vigilant state. The plot was publicly branded a Jacobin conspiracy, a label that placed the alleged culprits on the radical, dangerous fringe of revolutionary politics.

• 3. The Men Named as Plotters

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  Giuseppe Ceracchi was a Roman sculptor and one of the founders of the Roman Republic in 1798. He was among the most prominent figures attached to the alleged plot. François Topino-Lebrun, a painter described in sources as a patriotic fanatic, had studied under the celebrated Jacques-Louis David and served on the revolutionary tribunal jury. His presence gave the group an artistic, intellectual character that sat oddly alongside the image of cold-blooded assassins.

  Adjudant Joseph Antoine Aréna carried particular symbolic weight. His brother Barthelemy Aréna had actually tried to stab Bonaparte during the coup of 18 Brumaire, which meant the Aréna family name was already stained in the eyes of the new government. Dominique Demerville, a former clerk of the Committee of Public Safety, was closely connected to Bertrand Barère de Vieuzac, one of the most controversial figures of the Terror. Joseph Diana was 28 years old, a discharged notary with ties to Roman insurgent circles. Two others, Armand Daiteg, a sculptor aged 67, and Denis Lavigne, a trader aged 66, were arrested but ultimately discharged. So was Madeleine Fumey, 38 years old, described as either the cook or the mistress of Demerville.

• 4. Fouché and the Agent Provocateur

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  Joseph Fouché, whose police force received credit for foiling the attack, later set out his own account in his Mémoires. He wrote that towards mid-September 1800, word reached him of a plot forming around the opera house plan. A man named Harel, described as one of the accomplices, had been working as an informer, passing details to the war commissioner Lefebvre. Lefebvre then brought those revelations to Louis Antoine Fauvelet de Bourrienne, Napoleon's own secretary.

  Modern historians Jean Tulard and Thierry Lentz have examined this sequence and concluded that Harel was not merely an informer but an agent provocateur: someone planted inside the group to draw the plotters toward a trap that the police had already prepared. Fouché's Mémoires, written after the fact and shaped by Fouché's own interest in appearing indispensable, present Harel as a resourceful tool of the state. The account raises the possibility that some or all of the men arrested had been actively guided into the alleged conspiracy by a man who answered to the authorities.

• 5. Trial, Verdict, and Execution

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  After the Plot of the Rue Saint-Nicaise, a separate and deadlier royalist attack on Napoleon later in 1800, the men caught up in the daggers conspiracy were brought before the criminal court of the Seine. Three days of debate produced a verdict on 19 nivôse year IX, the 9th of January 1801, handed down at eleven o'clock in the evening. Four of the conspirators were condemned to death. Their appeal was rejected, and on the 30th of January the sentence was carried out.

  Ceracchi, the Roman sculptor who had helped found a republic in 1798, died alongside Topino-Lebrun, Demerville, and Aréna. The speed of the process, from arrest in October to execution in January, left little time for the questions already circulating about the plot's authenticity to gain legal traction. The grouping of the daggers trial with the broader context of Jacobin threats served the government's narrative, framing the dead men as enemies of order rather than possible victims of a fabricated case.