This extract appears to be a beautiful medieval map of Roman Britain. However, all is not as it seems.
In 1743, a copy of the map was sent to the antiquarian William Stukely by a student named Charles Bertram. The map was accompanied by a manuscript history of Britain. Stukely was fascinated by the map, believing it to be the work of a 14th century monk, Richard of Cirencester. The map seemed to provide a wealth of new historical information, such as previously unknown Roman place names. As a result, new Roman names such as Pennines (‘Pennines Montes’) appeared on Ordinance Survey maps. It was not until the 1860s that the map was proven to be a fake. Both the map and the manuscript had been created in the 1700s, and were entirely invented.