One interesting fact about Julius Caesar is that he was a key figure in the transformation of the Roman Republic into the Roman Empire. He played a significant role in the downfall of the Roman Republic and the rise of imperial rule in Rome. Another interesting fact is that Julius Caesar was famously assassinated on the Ides of March (March 15), 44 BCE, in the Roman Senate House by a group of nobles, including Gaius Cassius Longinus and Marcus Junius Brutus, who feared his growing power and influence.