Eight gold coins discovered during an archaeological excavation in Germany could confirm the site of the legendary Battle of Teutoburg Forest.

Such a find is extremely rare, the researchers say, and this recent discovery at Kalkriese expands the number of gold coins collected at the site by more than double the previous amount.

The coins featured images of the Emperor Augustus, with the imperial princes Gaius and Lucius Caesar on the back, and all date back to a period before the ancient battle.

Eight gold coins discovered during an archaeological excavation in Germany could confirm the site of the legendary Battle of Teutoburg Forest. Such a find is extremely rare, the researchers say

THE ANCIENT COINS These coins were minted between 2BCE and 5CE, and the archaeologists speculate they once belonged to an officer or higher-ranking Roman soldier. An aureus from the reign of Emperor Augustus would have been enough to feed an entire family in Rome for a month, the researchers say. Emperor Augustus is shown on the front, and Gaius and Lucius are pictured on the back of the coins, each carrying a lance, shield and a curved religious staff known as 'lituss.' Advertisement

In just six weeks of digging this season, archaeologists have uncovered mounting evidence that indicates Kalkriese was once the site of the ancient battlefield, according to Forbes.

Roughly 18,000 men were killed during the slaughter in Teutoburg Forest in 9C, when German tribes led by Arminius ambushed three Roman legions.

At the time, the Roman soldiers were led by the general Varus.

Kalkriese lies in the district of Osnabrück, Lower Saxony, Germany, and the coins were found along with pieces of Roman military equipment and bronze coins.

Researchers from the University of Osnabrück and Kalkriese, who led the dig, say the discovery of the eight gold coins is one of 'extraordinary' luck.

All are in a good state of preservation, though some show significant traces of use.

The team discovered the coins – called 'aurei' – all within a few meters of each other, indicating a coin purse was likely dropped to the ground in the course of fighting, or intentionally hidden.

These coins were minted between 2BCE and 5CE, and the archaeologists speculate they once belonged to an officer or higher-ranking Roman soldier.

These coins would have been of considerable value, they say, and before the most recent discovery, only seven gold coins had been found at the ancient battlefield.

Roughly 18,000 men were killed during the slaughter in Teutoburg Forest in 9C, when German tribes led by Arminius ambushed three Roman legions. At the time, the Roman soldiers were led by the general Varus. It's thought that this ancient battle took place at what is now Kalkriese

The coins featured images of the Emperor Augustus, with the imperial princes Gaius and Lucius Caesar on the back, and all date back to a period before the ancient battle

On the front of the coins, Emperor Augustus is pictured, Gaius and Lucius are pictured on the back of the coins, each carrying a lance, shield and a curved religious staff known as 'lituss.' They stand mirroring each other, and the researchers say this imagery has both military and religious allusions

An aureus from the reign of Emperor Augustus would have been enough to feed an entire family in Rome for a month, the researchers say, and so a small purse-full as what decorated the land could have provided for its owner for upwards of a year.

Gaius and Lucius are pictured on the back of the coins, each carrying a lance, shield and a curved religious staff known as 'lituss.'

They stand mirroring each other, and the researchers say this imagery has both military and religious allusions for the two princes, who were designated successors of Augustus.

The archaeologists say this the discovery raises new questions about the massacre, and indicate that there is still a need for more research at the site of the battlefield.