Copyright 2021 by Gary L. Pullman
When Christianity became the dominant religion of the Western world in 313, beginning with Emperor Constantine's proclamation of the Edict of Milan, new explanations were provided as to the origins and natures of various monsters for whom their origins and natures had differed during per-Christian days. This post traces these developments with regard to a few of the monsters that are staples, as it were, of horror fiction.
For example, the Russian Orthodox Church regarded vampires as once been witches or who had rebelled against the faith (Reader's Digest Association's “Vampires Galore!” However, an account of vampires was included in the second edition (1749) of Pope Benedict XIV's De servorum Dei beatificatione et sanctorum canonizatione suggested that vampires existed only in the imagination.
Portret van de theoloog Augustin Calmet by Nicholas Pitau. Source: Wikipedia
On the other hand, French theologian Dom Augustine Calmet was of the opinion that vampires, in fact, did exist, his research suggesting that “one can hardly refuse to credit the belief which is held in those countries, that these revenants come out of their tombs and produce those effects which are proclaimed of them.”
The opinion of the Pope and of Calmet seems to represent, in general, the beliefs of the populace: either vampires were imaginary or they were revenants (animated corpses returned from the grave).
The Church's stance, as expressed in the fourth-century Capitulatum Episcopi was that belief in werewolves marked one as an “infidel,” since God alone had the power to transform one species, such as human beings, into another, such as wolves.
During the Middle Ages, however, theologians took their cue from Augustine, who seemed to believe in the possibility of werewolves.
Illustration of werewolves from Werewolves of Ossory by Gervase of Tilbury. Source: Wikipedia
In Werewolves of Ossory (c. 1200), Gervase of Tilbury suggests that such human-animal transformations, including of men and women into wolves, having actually been witnessed a number of times, should not be lightly discounted as having occurred.
Other medieval works contended that God punished sinful men and women by transforming them into werewolves and assured readers that anyone that the Roman Catholic Church excommunicated would become werewolves (Ian Woodward, The Werewolf Delusion). Both God and saints had the power to effect the transformations of humans into werewolves, as St. Patrick was alleged to have done in regard to the Welsh King Vereticus.
Witches Sabbath by Francisco Goya. Source: reddit.com
According to Protestant Christianity, the witch, another monstrous figure, known to both the ancients and the people of the Middle Ages, gains her power—and most witches are female—by entering a contract with a demon (M. M. Drymon, Disguised as the Devil: How Lyme Disease Created Witches and Changed History).
Although Christian explanations of vampires, werewolves, and witches developed over many years, changing or emphasizing certain various features over others at times, it is clear that, in general, such creatures were products of dark magic or of sinful behavior, such as rebelling against God, blasphemy or heresy, entering contracts with demons, or practicing pagan faiths.