The Ides of March: the assassination of Julius Caesar
Julius Caesar was assassinated on 15 March 44 BC at a Senate meeting in the Curia of Pompey in Rome. A group of senators, including Marcus Junius Brutus, Gaius Cassius Longinus and Decimus Junius Brutus, attacked him after he became dictator for life. They opposed permanent personal domination, but killing Caesar did not restore a stable Republic. His death opened another struggle over armies, authority and his political inheritance.
Rome, 15 March 44 BC. Julius Caesar arrives for a Senate meeting in Pompey's theatre complex. A group of senators gathers close around him, using a petition to draw his attention. Then the conspirators attack. Among them are Marcus Brutus, Cassius and Decimus Brutus, men united against Caesar's permanent domination. Caesar dies in the Curia of Pompey. His killers emerge claiming liberty, but they have no secure command of Rome or its armies. The struggle passes to Antony, Caesar's adopted heir Octavian and their rivals. Assassination opens the way to renewed civil war.
Sources and context +
The historical guide below follows the people, events and surviving accounts behind this episode. Explore the sources.
Inside the episode
Cinematic scenes
Look closer at the individual moments within this story.
15 March 44 BC
The assassination in Pompey’s meeting hall
A petition draws Caesar into the senators’ circle; the assassination opens another struggle for Rome.
Rome, 15 March 44 BC. Caesar takes his place at a Senate meeting in the Curia of Pompey. Senators gather around him with a petition. A hand catches his toga, and the circle closes. The conspirators strike at the man they believe has placed himself above the Republic. Caesar falls, killed by fellow senators, including men who once accepted his forgiveness. Brutus and Cassius claim that liberty has been restored. Beyond the chamber, Rome has no settled future. Caesar's death releases a new contest for his armies, his name and the power he leaves behind.
Sources and context +
Caesar was killed in the Curia of Pompey, within Pompey’s theatre complex. Ancient accounts describe an approach with a petition and an attack by several senators. Exact dialogue, movements and last words are uncertain. The staging is non-graphic and interpretive.
The historical guide below follows the people, events and surviving accounts behind this episode. Explore the sources.
The event at a glance
The essentials.
Date
15 March 44 BC, the Ides of March
Place
Curia of Pompey, in Pompey’s theatre complex, Rome
Victim
Julius Caesar, dictator for life
Conspirators
Included Marcus Brutus, Cassius and Decimus Brutus
Aftermath
An unstable compromise, political violence and renewed civil wars
01
Why was Julius Caesar assassinated?
The immediate background was Caesar’s dictatorship for life. Years of military victory had left him dominant over the institutions that traditionally distributed authority among annual magistrates, the Senate and popular assemblies. Senators could still hold office, but Caesar controlled opportunities, honors and the terms on which former opponents returned to public life.
Some conspirators understood resistance as defense of republican liberty. Others had grievances about advancement or status, and the group included men who had benefited from Caesar. These motives could coexist. The evidence does not support a single explanation such as envy, democratic principle or a personal betrayal by Brutus. Their conception of liberty was shaped by elite Roman politics, not modern universal citizenship.
Rumors that Caesar wanted kingship intensified the danger. His refusal of Antony’s diadem did not dispel suspicion, because his existing authority already looked permanent. Ancient authors also describe resentment at ceremonial distinctions and apparent slights to senators. Such stories show what later Romans thought domination looked like; they cannot establish every participant’s private motive.
Who were Brutus, Cassius and the other conspirators?
Marcus Junius Brutus and Gaius Cassius Longinus were prominent senators who had opposed Caesar during the civil war before being pardoned. Brutus carried a family name associated with the expulsion of Rome’s kings, which made him a powerful symbol for a conspiracy presenting itself as liberation. Cassius was an experienced political and military figure, not merely Brutus’s accomplice.
Decimus Junius Brutus was a different man from Marcus Brutus and had served Caesar. Suetonius places him among the leaders and credits him with urging Caesar to attend the fatal meeting. Gaius Trebonius, Tillius Cimber and Publius Servilius Casca also appear in the accounts. Suetonius says more than sixty men joined the conspiracy, but that is an ancient reported total, not a complete surviving membership register.
Cicero welcomed Caesar’s removal but was not one of the planners. The conspiracy’s breadth explains how Caesar could be attacked among familiar political associates. It also helps explain the later failure: agreement that one man should die was easier to achieve than agreement about who should govern afterward.
The Senate met in the Curia of Pompey, a meeting hall within Pompey’s theatre complex in the Campus Martius. Caesar was not killed in the ordinary Senate house in the Forum, and the theatre’s stage was not the murder site. The association with Pompey, the rival Caesar had defeated, gave the location an additional symbolic charge in later accounts.
A Senate meeting offered the conspirators a plausible reason to approach Caesar together. They could surround him as petitioners and colleagues. Plutarch describes Antony being detained in conversation outside, preventing an important ally from being beside Caesar when the attack began. The setting made an intimate political ambush possible without requiring a battlefield confrontation.
The Ides was a calendar designation: in March it fell on the fifteenth. Later narratives surround the morning with warnings, unfavorable sacrifices and Calpurnia’s troubled dreams. Suetonius says Caesar hesitated before leaving and received a written warning that he did not read in time. These scenes form a powerful literary pattern of ignored foreknowledge; their exact sequence and wording are less secure than the place and outcome of the attack.
Once Caesar sat down, Cimber approached with a petition concerning his exiled brother and grasped Caesar’s clothing. Casca struck, and others joined the assault. The sources portray confusion and overlapping blows rather than a controlled formal execution. Caesar died at the meeting while the surviving senators dispersed.
Suetonius reports twenty-three wounds and repeats a physician’s judgment that only one was fatal. That familiar number is a textual claim, not a modern forensic finding. Likewise, the Latin “Et tu, Brute?” is famous from Shakespeare rather than a securely recorded final utterance. Suetonius gives a mainly silent death while noting an alternative story about words in Greek to Brutus. Caesar’s last words remain uncertain.
The assassins expected their deed to carry political meaning, but they had not removed Caesar’s supporters or secured universal public approval. Antony remained consul, Lepidus had military power, and veterans had reasons to defend Caesar’s settlements. The first response was uncertainty and negotiation rather than an immediate coronation of a successor.
A compromise protected the conspirators while leaving Caesar’s acts in force. That preserved appointments and property arrangements on which many people depended. His will then revealed substantial gifts to the public and made his great-nephew Gaius Octavius a principal heir and adopted son. The funeral brought public grief and anger, with the crowd attacking the conspirators’ houses in Suetonius’s account.
Why did the assassination fail to restore the Republic?
Caesar’s killers had removed a dominant individual without resolving the distribution of military command, land, money and legitimacy. His heir, conventionally called Octavian, entered the competition. Antony, Octavian and Lepidus eventually formed a legally empowered triumvirate, carried out proscriptions and fought the conspirators. Brutus and Cassius died after defeat at Philippi in 42 BC.
Further conflict then divided the victors themselves. Actium in 31 BC and the conquest of Egypt in 30 BC eliminated Antony’s coalition; the Augustan settlement followed. The assassination therefore belongs within a long transformation, not a simple switch from Republic to Empire on one afternoon. Earlier crises such as the Catiline conspiracy had already exposed how fear, emergency authority and political violence could erode shared rules.
Caesar’s victories in civil war concentrate authority in his hands.
Early 44 BC
He accepts the dictatorship for life.
February 44 BC
Antony offers Caesar a diadem at the Lupercalia; Caesar rejects it.
15 March 44 BC
Conspirators kill Caesar during the meeting at Pompey’s curia.
Following days
Political leaders attempt a compromise preserving Caesar’s acts while protecting his killers.
Later in March
Caesar’s funeral and bequests strengthen public hostility toward the conspirators.
43 BC
Antony, Octavian and Lepidus form the Second Triumvirate; proscriptions follow.
42 BC
Brutus and Cassius are defeated at Philippi and die.
Understand the event
Questions people ask
Who killed Julius Caesar?+
A senatorial conspiracy that included Marcus Junius Brutus, Gaius Cassius Longinus, Decimus Junius Brutus, Casca, Cimber and others. Caesar was attacked by a group, not killed by Brutus alone.
When and where was Caesar assassinated?+
On 15 March 44 BC at the Curia of Pompey in Rome, a Senate meeting hall attached to Pompey’s theatre complex.
What does Ides of March mean?+
It means 15 March in the Roman calendar. The Ides was an ordinary monthly date before Caesar’s murder made this particular occurrence famous.
Did Caesar say “Et tu, Brute?”+
That Latin phrase is famous from Shakespeare. Ancient sources do not establish it as Caesar’s last words; they preserve different versions, including silence and a disputed remark in Greek.
How many times was Caesar stabbed?+
Suetonius reports twenty-three wounds. It is the ancient literary basis for the familiar number, not a total independently verified by surviving physical evidence.
Was Brutus Caesar’s son?+
Marcus Brutus was not Caesar’s acknowledged son. Rumors connected Caesar with Brutus’s mother, Servilia, but that is not proof of paternity. Caesar’s adopted heir in his will was Gaius Octavius, the future Augustus.
Did the Roman Empire begin when Caesar died?+
No. His assassination was followed by years of civil war. The settlement of 27 BC under Augustus is a conventional starting point for the imperial principate.
Read the evidence
Sources and perspective
Sources are identified beside the sections they support. Ancient and medieval authors wrote from particular positions; a detailed story can still be partisan, late or uncertain. Archaeology can test an account without confirming every detail.
