“It is possible that the origin of Friday 13th in October 1307. Europe and France in particular was worried by a religious group known as the Knights Templar. These knights were a pan-national organisation that though created for religious goals, became an extremely powerful political and economic network with little allegiance to Earthly kings. They were famous for wearing white with a red cross, now best known for the Flag of England. King Philip IV of France issued a surprise decree in which hundreds of Templars were arrested, imprisoned and many executed on flimsy and false allegation on Friday the 13th and the organisation was effectively destroyed.”
– Writer Stephen Liddell
Commentary by The Secular Jurist: The Knights Templar legacy resounds to this day in the form of conspiracy theories related to possible connections with freemasonry, which have been popularized by authors such as Dan Brown in his 2003 novel The Da Vinci Code.