Jacques De Molay was burned to death on March 18, 1314, at the age of 70 or 71. In 1314 the curse work that the characters constantly utter was not in use. In fact, it did not come into common use for another one hundred and fifty years or more.
Yet, characters are using it in their outbursts on a regular basis, people of that era would not have used this modern colloquialism.
Yet, characters are using it in their outbursts on a regular basis, people of that era would not have used this modern colloquialism.