Piso(250 — 261)
Piso
Rome antique
6 min read
A Roman aristocrat of the 1st century, Gaius Calpurnius Piso was the figurehead of a sweeping conspiracy to overthrow the emperor Nero in 65 AD. The plot was uncovered, failed, and triggered a wave of deadly repression.
Frequently asked questions
Key Facts
- Gives his name to the Pisonian conspiracy (conjuratio Pisoniana) plotted against Nero in 65 AD
- The plot brought together senators, knights, and officers of the Praetorian Guard who were discontented with Nero's regime
- The conspiracy was uncovered before it could be carried out, in April 65 AD
- Its exposure led to a brutal crackdown and the forced death of several of Nero's close associates, including the philosopher Seneca
- Piso was forced to commit suicide in 65 AD after the plot failed
Works & Achievements
Free defenses of citizens before the courts that earned Piso his reputation for eloquence and his great popularity.
Generosity toward his friends and support for the arts, making his house a center of aristocratic social life.
Nominal leadership of the vast plot that brought together senators, knights, and praetorians to overthrow Nero — the major act that wrote his name into history.
A document written before his suicide, in which he heaped flattery upon Nero in the hope of protecting his wife Satria Galla.
Anecdotes
Caius Calpurnius Piso was renowned for his eloquence and charm: he defended accused men for free in court and sang while accompanying himself on the cithara, which made him very popular in Rome. This popularity made him the ideal candidate to replace Nero in the eyes of the conspirators.
The conspiracy of 65 was betrayed by a single detail: a freedman named Milichus denounced the plot after catching his master, the senator Flavius Scaevinus, making suspicious preparations — having an old dagger sharpened and bandages made ready. This denunciation triggered the collapse of the entire plot.
The famous philosopher Seneca, Nero's former tutor, was accused of being linked to the Pisonian conspiracy. Forced to commit suicide, he opened his veins with a stoic calm that has remained legendary, dictating his final thoughts to his secretaries.
When Piso learned that the plot had been discovered, his friends urged him to march on the camp of the Praetorians or to harangue the people in an attempt at a coup. Out of caution or weakness he refused, went home, and opened his veins, preferring a quiet death to risky resistance.
The repression that followed was so sweeping that it decimated the senatorial aristocracy: poets such as Lucan, soldiers, senators — all were forced to commit suicide or were executed. The historian Tacitus describes Rome saturated with funerals and denunciations during those dark months.
Primary Sources
A conspiracy that began and grew, to which senators, knights, soldiers, and even women lent their support, as much out of hatred for Nero as out of favor for Piso.
His birth was illustrious; his eloquence served the defense of citizens, his generosity his friends; he had an affable manner and appearance, but no seriousness nor moderation in his pleasures.
He foiled and suppressed the conspiracy of Piso, which formed in Rome.
Piso had the veins of his arms opened. His will was filled with odious flatteries toward Nero, out of love for his wife.
Key Places
Capital of the Empire where Piso led his public life and where the conspiracy was organized and then exposed in 65.
The political and judicial heart of Rome where Piso pleaded cases free of charge, winning popular favor.
A luxurious seaside resort on the Gulf of Naples where Piso owned a villa; one plan considered assassinating Nero there, as a guest in his home.
The great circus of Rome where the conspirators planned to strike Nero during the games dedicated to Ceres.
Barracks of the imperial guard whose support was decisive; the tribune Subrius Flavus, a conspirator, served there.
