The Rite of Exorcism
The rite was substantially revised only in 1999, showing it is a living, periodically updated practice rather than an unchanging ancient formula. A well-documented 1970s case resulted in negligent-homicide convictions for the priests and family involved, a sobering real-world consequence tied directly to the ritual's use.
The Rituale Romanum's exorcism rite (1614, revised 1999); the Anneliese Michel case (1976), resulting in 1978 convictions
The Catholic Church's formal ritual for expelling a demonic presence, entered into official liturgical use in the seventeenth century.