He has moved offices more than 23 times after fellow priests complained of the screams from his office at all hours of the day and night. Slamming doors, overturning chairs, rolling eyes and vomiting are part of the exorcist's daily routine.
"Some have vomited metal the size of a human finger, others have vomited rose petals," he says.
The exorcist's guide is the Scriptures, his tools are prayer.
"More than 90 percent of the cases of people who are possessed come from spells," he says. "People with anger or vendettas seek out magicians to cast spells and they are paid handsomely."
The fact that the devil has penetrated the halls of the Vatican should make the most reverent of Catholics shudder. Not so according to Amorth and his colleagues. Their work is to protect you.
"The principle responsibility of the exorcist is to free man from the fear of the devil."