Although this map first came to notice a few years before 1750 its impact lasted for many years. It was not until 1860, over a 100 years later, that it was proved to be a fake - a very good one but a fake nonetheless.

It was created by Charles Bertram and it fooled the leading experts of the day who said the information on it had come from a monk living in the 1300s. The map was very clever in that it contained lots of information that was already known but Bertram had also added details that he had made up!