Charles Julius Bertram was the perpetrator of one of the most successful and damaging hoaxes ever to be perpetrated on the British antiquarian establishment. He was born in London in 1723, son of an English silk dyer who is thought to have emigrated to Copenhagen, Denmark, among the retinue of Princess Louisa, a daughter of George II, upon her marriage to Crown Prince Frederick of Denmark in 1743.

In 1747, he began his scheme to convince William Stukeley that he had access to a manuscript supposedly written in the 14th century by a monk, Richard of Cirencester. The De Situ Britanniae and the eighteen Itineraries contained within it, which Bertram presumably created himself, were accepted as genuine in Britain for the next hundred years, and appear frequently as source material in 18th & 19th century writings on Roman history and Roman roads in particular, and even some 20th century ones.

A more complete account of the hoax and its effects is given in De Situ Britanniae - An 18th Century Hoax

Charles Bertram (1723 - 1765)