Exorcism and its practice

Exorcism is a practice of freeing persons, objects, and places from negative influence.

In Christianity, it is practiced to get rid of demons possessing something. The person performing an exorcism is known as an exorcist.

Exorcists invoke God, different Angels, or Jesus to intervene with the practice of warding off evil spirits.

According to Catholics, it requires several weeks over many years to expel a deeply entrenched evil spirit.