It does date back to Friday 13th October 1307, when Pope Pious issued a papal bull (an official order) commanding the arrest of the Knights Templar. The French King, Peter the Fair, was the main person to enact this order, because he owed the Templars a great deal of money. The Spanish monarch, though, being indebted morally to the Templars, arrested them, charged and tried them for heresy - but found them innocent. This led to the Grand Inquisition, which focused on the Spanish Templars, and is more commonly now known as the Spanish Inquisition.