The Knights Templar were raided and executed in France, on Friday the 13th, in October of 1307. They were a secretive order known for relic hunting. It is widely rumored that they had the Holy Grail, but what was the Holy Grail? From Dan Brown’s novels, to Arthurian legends, where lies the truth? Historian and author, Dr. Heather Lynn discusses her own theory of the meaning behind the Holy Grail, citing primary sources from the past. Could the Holy Grail actually be a map to the hidden mysteries of the Gnostic Jesus?