Jacques Demolay and the Knights Templar

Both the number 13 and the day of the week Friday have had varied "reputations" throughout the centuries - sometimes considered to be holy and at other times considered to be unholy. In the Western world, the superstition linking Friday the 13th with being unlucky is primarily associated with the final Grand Master of the Knights Templar, Jacques Demolay, and the date of Friday, October the 13th, 1307 AD (Old Style - OS).
In 1099 AD the Roman Catholic Church - via the now infamous bloody religious wars of the Christian Crusades - regained control over the holy city of Jerusalem. However, the lands surrounding Jerusalem were still in the hands of the Moslems. According to traditional versions of the story, a warrior order of the Roman Catholic Church eventually banded together that was (allegedly) for purposes of protecting Christian travelers on their way to the holy city of Jerusalem. The warrior order was officially recognized by the Roman Catholic Church in 1118 AD, and they were at that time provided with a headquarters building located on Mount Moriah. This building was located on a site traditionally thought to be the former Temple of King Solomon. Thus, the warrior order became known as the Knights of the Temple, or the Knights Templar.

To make a very long (but incredibly interesting) story short, Jacques Demolay became the Grand Master of the Knights Templar in around 1293 AD During the two hundred years of their existence within the Roman Catholic Church, the Knights Templar had grown into a rather rich and powerful political force to be reckoned with. During Demolay's stay in office as Grand Master, the Templars had increasingly grown in disfavor with the current pope, Pope Clement V, and with the King of France, Phillip the Fair.

Betrayal
In 1307 AD the pope and the king arranged for the Templars to meet with them for a "friendly" convocation in Paris, France. Instead, Grand Master Jacques Demolay was arrested on Friday, October the 13th, 1307 AD (Old Style). Seven years later, in 1314 AD, Jacques DeMolay was burned at the stake for the crime of church heresy. Legend continues on that before Demolay died - he predicted to the king and pope that he would meet them both in heaven within the next year. Fact is... the king and the pope did die in the year 1314 AD. It is not known whether or not that Jacques DeMolay actually met up with these two rascals in heaven.

Heresy
As for the "heresy" surrounding the Knights Templar. The "heresy" of the Templars was quite likely related to what might be called the integration or marriage of the "archetypal feminine" with the masculine Christian Trinity. For more on the alleged heresy... you might, however, want to pick up a copy of Dan Brown's "Da Vinci Code."

I think this kind of superstition is what people make of it. A Friday, the 13th day, from the astronomical and universal time point of view is not different from any other day.
But, if people think it's gonna happend something bad, then something bad it's gonna happend, to them and to other around them !!

I agree with queensoft! Of what you're afraid, that's going to happen!
I'm an optimist person, I see the full half.
Thincking better is good for your health also.
But, sometimes you got to think about your security too, about whan can happen, just to know and realize the reality we're liveing into.