For the thirteenth post in this series I decided to dig into the mystery surrounding the number thirteen itself. One theory is that it’s infamy comes from the order given to arrest all of the Knights Templar on Friday the 13th, 1307. Bonus! Two mysteries in one. The Knights Templar have been the source of many a conspiracy theory virtually since their inception. What were they really up to? What did they really know? What relics did they actually possess and where are they today?