Ancient X-Files

New high-resolution images of the Mona Lisa may reveal hidden numbers and letters. Could they be the key to understanding the enigmatic painting?

Father Patrick Hough visits Notre Dame Cathedral to examine a relic that's said to be the crown of thorns worn by Christ at his crucifixion.

Dr Sabine Hyland attempts to study the three dimensional language found in sacred knotted Incan relics and crack their intricate code.

Following clues in the Old Testament, an archaeologist believes he has discovered the location of the original cities of sin, Sodom and Gomorrah.

Investigate what recent advances in science might reveal about this mysterious religious relic since the last time it was tested in 1988.

A mysterious burial 4,000 years ago and the recent discovery of a body with a missing heart leads to a search for the world's oldest vampire

Join underwater archaeologist Guillermo de Anda as he travels across Mexico and Guatemala in search of the legendary Mayan underworld, Xibalba.

After centuries of debate, archaeological evidence unearthed in Bulgaria may reveal not only where the Great Flood happened, but what caused it.

Millions of Christians retrace Christ's footsteps every year, but now an archaeologist claims that they may be worshipping at the wrong sites.

Ancient artefacts that defy rational explanation come under the microscope, as this series explores the unsolved mysteries of the past.

Could Joan have survived her execution? New evidence suggests that France's national heroine may not have been burnt at the stake after all.

An expert in Arthurian legend makes an unlikely journey to a remote Italian church, and a tiny pendant challenges the origins of Christianity.

Death Cult Temple & Bog Bodies Of Ireland: Experts explore the revolutionary discovery of Gobekli Tepe, along with brutally maimed bodies unearthed in the muddy landscape of Ireland.