The Ides of March (Latin: Idus Martii or Idus Martiae) is the name of the 15th day of March in the Roman calendar.
In modern times, the term Ides of March is best known as the date on which Julius Caesar was killed in 44 B.C. Caesar was stabbed (23 times) to death in the Roman Senate by a group of conspirators led by Marcus Junius Brutus and Gaius Cassius Longinus. The group included 60 other co-conspirators according to Plutarch.
According to Plutarch, a seer had foreseen that Caesar would be harmed not later than the Ides of March and on his way to the Theatre of Pompey (where he would be assassinated), Caesar met that seer and joked, "The ides of March have come", meaning to say that the prophecy had not been fulfilled, to which the seer replied "Ay, Caesar; but not gone." This meeting is famously dramatized in William Shakespeare's play Julius Caesar, when Caesar is warned by the soothsayer to "beware the Ides of March."
The word Ides comes from the Latin word "Idus" and means "half division" especially in relation to a month. It is a word that was used widely in the Roman calendar indicating the approximate day that was the middle of the month. The term ides was used for the 15th day of the months of March, May, July, and October, and the 13th day of the other months. The Ides of March was a festive day dedicated to the god Mars and a military parade was usually held.
On the Ides of March (15 March; see Roman calendar) of 44 BC, Caesar was due to appear at a session of the Senate. Mark Antony, having vaguely learned of the plot the night before from a terrified Liberator named Servilius Casca, and fearing the worst, went to head Caesar off. The plotters, however, had anticipated this and, fearing that Antony would come to Caesar's aid, had arranged for Trebonius to intercept him just as he approached the portico of Theatre of Pompey, where the session was to be held, and detain him outside. (Plutarch, however, assigns this action to delay Antony to Brutus Albinus). When he heard the commotion from the senate chamber, Antony fled.
According to Plutarch, as Caesar arrived at the Senate, Tillius Cimber presented him with a petition to recall his exiled brother. The other conspirators crowded round to offer support. Both Plutarch and Suetonius say that Caesar waved him away, but Cimber grabbed his shoulders and pulled down Caesar's tunic. Caesar then cried to Cimber, "Why, this is violence!" ("Ista quidem vis est!"). At the same time, Casca produced his dagger and made a glancing thrust at the dictator's neck. Caesar turned around quickly and caught Casca by the arm. According to Plutarch, he said in Latin, "Casca, you villain, what are you doing?" Casca, frightened, shouted, "Help, brother!" in Greek ("ἀδελφέ, βοήθει!", "adelphe, boethei!"). Within moments, the entire group, including Brutus, was striking out at the dictator. Caesar attempted to get away, but, blinded by blood, he tripped and fell; the men continued stabbing him as he lay defenceless on the lower steps of the portico. According to Eutropius, around 60 or more men participated in the assassination. He was stabbed 23 times.According to Suetonius, a physician later established that only one wound, the second one to his chest, had been lethal. The dictator's last words are not known with certainty, and are a contested subject among scholars and historians alike. Suetonius reports that others have said Caesar's last words were the Greek phrase "καὶ σύ, τέκνον;" (transliterated as "Kai su, teknon?": "You too, child?" in English). However, Suetonius says Caesar said nothing. Plutarch also reports that Caesar said nothing, pulling his toga over his head when he saw Brutus among the conspirators. The version best known in the English-speaking world is the Latin phrase "Et tu, Brute?" ("And you, Brutus?", commonly rendered as "You too, Brutus?"); this derives from Shakespeare's Julius Caesar, where it actually forms the first half of a macaronic line: "Et tu, Brute? Then fall, Caesar." It has no basis in historical fact and Shakespeare's use of Latin here is not from any assertion that Caesar would have been using the language, rather than the Greek reported by Suetonius, but because the phrase was already popular when the play was written. According to Plutarch, after the assassination, Brutus stepped forward as if to say something to his fellow senators; they, however, fled the building. Brutus and his companions then marched to the Capitol while crying out to their beloved city: "People of Rome, we are once again free!" They were met with silence, as the citizens of Rome had locked themselves inside their houses as soon as the rumor of what had taken place had begun to spread. Caesar's dead body lay where it fell on the Senate floor for nearly three hours before other officials arrived to remove it.
Caesar's body was cremated, and on the site of his cremation the Temple of Caesar was erected a few years later (at the east side of the main square of the Roman Forum). Nowadays, only its altar remains. A lifesize wax statue of Caesar was later erected in the forum displaying the 23 stab wounds. A crowd who had gathered there started a fire, which badly damaged the forum and neighboring buildings. In the ensuing chaos Mark Antony, Octavian (later Augustus Caesar), and others fought a series of five civil wars, which would end in the formation of the Roman Empire.