Royston Cave
A bell-shaped man-made chamber under the streets of Royston, Hertfordshire, rediscovered in 1742, its walls covered with medieval carvings of saints, crucifixions and enigmatic figures.
1742 CE · 52.05, -0.02 · status: unexplained
The account
It lies at the crossing of Ermine Street and the Icknield Way. Figures thought to show St Catherine and St Christopher are among the carvings, which have parallels only in a few places in central Europe and Palestine. The Knights Templar are a popular, if unlikely, candidate as its makers.
The sceptical view
Its origin and purpose remain unknown; most scholars favour a medieval religious or storage use rather than secret orders.
The researched reading
A real medieval carved chamber whose exact purpose is lost. It is a historical puzzle with no supernatural element.
| Explanation | Weight | Why |
|---|---|---|
| Undetermined | 50% | The share a generic explanation had beyond what has been shown for this case: it fits many cases like this one, but has not been demonstrated for this one. |
| A cultural story | 40% | The carvings are medieval Christian imagery cut by people into soft chalk at an important crossroads. A chapel, hermitage or store fits. The Templar story is popular legend layered on an undated site. |
| A hoax or fabrication | 3% | Some carvings could have been added after 1742, but most are accepted as medieval in style. |
| Perception, memory or mind | 2% | Visitors read secret symbols into eroded figures, a form of pareidolia. |
| Something in the surroundings | 2% | Nothing unexplained about the setting. |
| A known natural phenomenon | 2% | The chamber is artificial, and only its preservation is natural. |
| Genuinely anomalous | 1% | Its purpose is unknown, but there is nothing inexplicable about it. |
Official position: Historians regard it as a medieval man-made chamber of uncertain use.