The Ides of March coin, also known as the Denarius of Brutus or EID MAR, is a rare coin issued by the Roman Republic from 43 to 42 BC to celebrate the assassination of Julius Caesar on March 15, 44 BC.
One side features Marcus Junius Brutus, once a close friend of Cesar who, after becoming disillusioned with his autocratic behavior and polices, helped lead his assassination.
The other side depicts a pileus cap between two daggers. The pileus cap was a Roman symbol of freedom and was often worn by recently freed slaves (it is still used in the coat of arms of several republics and in revolutionary art and propaganda); the daggers, of course, represent the assassins’ weapons. At the bottom is EID MAR, short for Eidibus Martiis – “on the Ides of March” – the date Cesar was assassinated.
The coins were minted under the auspices of Brutus during the “Liberator’s Civil War” that followed Cesar’s death; they were likely intended as a form of propaganda, or to lend official legitimacy to the assassination, which was not supported by the majority of Romans, as the assassins had hoped.
Given its brief and minimal use, the coin is considered one of the rarest in the world.
Fun fact: The Ides of March coin is a type of “denarius”, a nickel-sized silver coin that was standard Roman currency for about four centuries. It is the root for the word “money” in several Mediterranean countries, including Spain (dinero), Italy (denaro), Slovenia, (denar) and Portugal (dinheiro), and also survives in the Arabic word “dinar”, the name for the official currencies of several Arab countries, including Algeria, Tunisia, and Syria (all Mediterranean) and farther off places like Kuwait and Iraq.