Exorcism is a ritual dedicated to dislodging an evil entity that has taken over a human being, an animal or a house.
This practice is probably universal and I offer the Celtic version here.
We find the practice of exorcism in all societies, from the primitives to the present day.
The Celtic version presented here, starting in the Stone Age to flourish in the time of the dolmens and menhirs of Stonehenge.