He was a friend of Cicero, to whom he gave his support at the time of the Catilinarian conspiracy (Plutarch, Cicero, 20; Cicero„ Pro Sull y, xiv.
But they still remained hostile to Rome, as is shown by the conduct of their ambassadors in the Catilinarian conspiracy (63; see Catiline); two years later a revolt under Catugnatus was put down by Gaius Pomptinus at Solonium.
He consistently opposed Caesar, whom he endeavoured to implicate in the Catilinarian conspiracy.
In this he was successful at the time of the Catilinarian conspiracy, in the suppression of which he was materially aided by the equites.
Lucius Calpurnius Bestia, one of the Catilinarian conspirators, possibly a grandson of the above.
He imitated the Greek historians in taking particular actions - the Jugurthan War and the Catilinarian Conspiracy - as the subjects of artistic treatment.
Publius Cornelius Lentulus, nicknamed Sura, one of the chief figures in the Catilinarian conspiracy.
In 63 B.C. he was curule aedile, assisted Cicero in the suppression of the Catilinarian conspiracy, and distinguished himself by the splendour of the games he provided.
After the suppression of the Catilinarian conspiracy, Cotta proposed a public thanksgiving for Cicero's services, and after the latter had gone into exile, supported the view that there was no need of a law for his recall, since the law of Clodius was legally worthless.
Cicero, therefore, was fully aware of the danger which would threaten himself from his execution of the Catilinarian conspirators.
On the outbreak of the Catilinarian conspiracy, Antonius was obliged to lead an army into Etruria, but handed over the command on the day of battle to Marcus Petreius, on the ground of ill-health.
For a time he co-operated with P. Clodius Pulcher, probably out of hostility to Cicero, who had caused Lentulus Sura to be put to death as a Catilinarian; the connexion was severed by a disagreement arising from his relations with Clodius's wife, Fulvia.
He sided with Cicero during the Catilinarian conspiracy, did his utmost to prevent his banishment, and subsequently supported his claim for the restoration of his house.
On the next day Cicero attacked Catiline so vigorously in the senate (in his first Catilinarian oration) that he fled to his army in Etruria.
Little else is known of him except that he declared in favour of the death punishment for the Catilinarian conspirators.