Roman war booty leads to fall in gold prices

Like many ambitious Romans of noble birth, Caesar began his career seeking political power and, above all, wealth. In corrupt and competitive Rome, money could buy soldiers, influence and authority. Before 61 BCE, Caesar operated relatively quietly – though he accumulated significant debt. But from that point on, he rose rapidly in the public eye.

In 59 BCE, Caesar was elected consul, the highest office in the Roman Republic, though it lasted only one year. After his term, he was appointed governor of the Roman provinces of Gaul and Illyria (modern-day Balkans). At the time, Roman Gaul covered only southern France. The rest of Gaul – modern France, Belgium, and Luxembourg – was home to dozens of wealthy and well-organised Celtic tribes. These tribes lived in prosperous cities, traded with Rome, and minted their own silver and gold coins.

With four legions – about 20,000 soldiers – Caesar launched a campaign that, between 58 and 50 BCE, brought nearly all of Gaul under Roman control. The empire’s northern border shifted dramatically, reaching the Rhine. Caesar likely even set foot in what is now the Netherlands.

He claimed the wars were defensive, but modern historians agree they were largely driven by his political ambitions and need to repay debts. Still, the conquest had strategic value: it ended Celtic raids into Roman territory. To publicise his victories, Caesar had coins minted celebrating the defeat of the Gauls.

Roman coins were not just currency – they were a powerful medium for spreading political messages. Coins acted as a true mass medium. Minted in vast quantities, they reached a wide audience and helped Caesar shape public opinion, especially as he faced accusations of excessive violence in Gaul. By his own account, he killed hundreds of thousands, including women and children.

Caesar returned to Italy and, after a civil war, was declared dictator for life in 45 BCE – a level of power never before seen in Rome. He also became the first Roman to feature his own portrait on coins during his lifetime. His bold moves and immense power alarmed his enemies. On the Ides of March (15 March) 44 BCE, a group of conspirators stabbed him to death.

At his death, Caesar's personal fortune was estimated at 100 million denarii – an astronomical sum, even by Roman elite standards. His wealth came largely from the eight years of plundering Gaul. The looting was so extensive that the Celts could no longer mint gold or silver coins; afterwards, they only struck bronze ones.

Caesar melted much of the Gallic gold into coins to pay his soldiers. Gold coins were easier to distribute than silver ones becausethey were worth 25 times more, sofewer were needed for large payments. With huge number of gold coins in circulation, this marked the first time gold coins played a major role in Roman currency. According to the historian Suetonius, Caesar had so much gold that he sold it at rock-bottom prices. The result? A dramatic drop in the price of gold—by as much as one-third across the Roman Empire.

Caesar’s successors, the first Roman emperors, continued minting large quantities of gold coins, making them a permanent part of the Roman monetary system. But the sudden influx of gold disrupted the gold market. A similar event occurred 150 years later, when Emperor Trajan (98–117 CE) conquered wealthy Dacia (modern Romania). Again, the Roman Empire was flooded with gold, leading to another sharp fall in its value and further economic instability.