The assassination of Julius Caesar, the dictator of the Roman Republic, by a group of senators takes place on the Ides of March.

Julius Caesar, the Roman dictator, was assassinated on the Ides of March 44 BC by a group of senators during a Senate session at the Curia of Pompey, located within the Theatre of Pompey in Rome. The conspirators, numbering between 60 and 70 individuals and led by Marcus Junius Brutus, Gaius Cassius Longinus, and Decimus Junius Brutus Albinus, stabbed Caesar approximately 23 times. They justified the act as a preemptive defense of the Roman Republic, asserting that Caesar's accumulation of lifelong political authority—including his perpetual dictatorship and other honors—threatened republican traditions.

Gaius Julius Caesar was a Roman general and statesman. A member of the First Triumvirate, Caesar led the Roman armies in the Gallic Wars before defeating his political rival Pompey in a civil war. He subsequently became dictator from 49 BC until his assassination in 44 BC. Caesar played a critical role in the events that led to the demise of the Roman Republic and the rise of the Roman Empire.

A Roman dictator was an extraordinary magistrate in the Roman Republic endowed with full authority to resolve some specific problem to which he had been assigned. He received the full powers of the state, subordinating the other magistrates, consuls included, for the specific purpose of resolving that issue, and that issue only, and then dispensing with those powers immediately.

The Roman Republic was the era of classical Roman civilisation beginning with the overthrow of the Roman Kingdom and ending in 27 BC with the establishment of the Roman Empire following the War of Actium. During this period, Rome's control expanded from the city's immediate surroundings to hegemony over the entire Mediterranean world.