Around the middle of last century, some archaeologists stumbled across this relic inside the Great Wall that surrounds central Rome.
Try as they might, they were unable to decipher what was written on it – until now.
With modern-day thinking, your challenge is to decide what this relic was used for.
For those with a good knowledge of languages, and the ability to collate and analyse new information quickly … this should take you about 10 seconds.
Otherwise, it could take you up to 10 hours to come up with the solution.