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№ 19383 Ghost Stories

Sister Agnes: The Possession Case

Filed
20 July 2026
Reading time
5 min

The Demonic Possession Case of Sister Agnes at Notre Dame de Lourdes, Canada

Background and Historical Context

In 1938, the small village of Notre Dame de Lourdes in Quebec, Canada, witnessed one of its most shocking and enduring mysteries: the demonic possession case of Sister Agnes. This event has been the subject of intense speculation and debate among religious scholars, paranormal investigators, and curious onlookers alike. The case began with a series of inexplicable behaviors and culminated in a public exorcism that garnered national attention.

Sister Agnes, a 23-year-old nun, was part of the Sisters of Notre Dame de Lourdes congregation. Her convent, situated in the quiet hamlet of Notre Dame de Lourdes, had been operating for over a decade without incident. However, on February 15, 1938, Sister Agnes began to display strange behaviors that rapidly escalated into full-blown possession.

Key Events and Sightings

The Early Signs (February-March 1938)

On February 15, 1938, Sister Agnes started showing signs of distress. She exhibited an unusual irritability and a sudden change in her demeanor. By March 1, the community was alarmed by her behavior. She began speaking in tongues, uttering strange phrases that no one could understand. Her eyes would roll back, and she would fall into fits of uncontrollable laughter or screaming.

The first public sighting of these incidents occurred on March 5, when Sister Agnes was seen wandering the convent grounds in a daze, muttering unintelligibly. The following day, March 6, witnessed her exhibiting more severe symptoms. She locked herself in her room and refused to come out, banging on the walls and doors with such force that they threatened to fall apart.

The Exorcism (March 10-15, 1938)

On March 10, 1938, a team of experienced exorcists arrived at Notre Dame de Lourdes. Led by Father Joseph-Marie Groulx and Father Émile Béliveau, these priests were known for their expertise in dealing with demonic possession cases. The exorcism began on the evening of March 10.

The initial attempt to bring Sister Agnes into a state of prayer failed when she suddenly leapt from her bed, screaming incoherently and running through the convent hallways. Father Groulx immediately ordered a full-scale exorcism. During the ceremony, which lasted several hours, Sister Agnes was bound with chains and recited prayers in Latin.

The climax of the exorcism came on March 15, when Sister Agnes was seen thrashing violently against her restraints. She reportedly spat out a solid, black object from her mouth, much to the horror of those present. This event is considered one of the most significant moments of the possession and led many believers to conclude that the demonic entity had indeed been expelled.

Witness Accounts and Evidence

Sister Agnes’s Descriptions

According to witnesses, Sister Agnes spoke in tongues during fits, uttering strange phrases such as “La maladie est sur toi” (The sickness is upon you) and “Je suis le diable” (I am the devil). Her eyes would turn yellowish-green, and she displayed supernatural strength. One witness reported that Sister Agnes once pulled a heavy table across a room with ease.

The Black Object

The most compelling piece of evidence was the black object expelled from her mouth during the exorcism on March 15. A physical sample was collected and sent for analysis to Dr. Charles Dugas, a prominent physician at the nearby hospital. His report stated that the object was “a small, solid mass with a consistency similar to rubber.” While this did not definitively prove demonic possession, it added another layer of mystery to the case.

Investigations and Research

The Role of Experts

Father Groulx and Father Béliveau were not the only experts involved. They consulted with other religious figures, including Cardinal Jean-Capolino, who was then Archbishop of Quebec City. The cardinal’s involvement lent additional credibility to the proceedings. He ordered a thorough investigation into Sister Agnes’s background and medical history but found no physical ailments that could explain her symptoms.

Media Attention

The case attracted national media attention, with newspapers from across Canada covering the events at Notre Dame de Lourdes. Reports ranged from skeptical to sensationalist, fueling public curiosity about the nature of demonic possession. The exorcism was broadcast on radio, further amplifying its reach and impact.

Current Status and Ongoing Mystery

Post-Exorcism Life

Following the exorcism, Sister Agnes was placed under a strict regimen of prayer and spiritual counseling. Despite initial concerns that she might never fully recover, she eventually returned to her duties as a nun. However, many in the community remained skeptical about the validity of the exorcism.

Academic Interest

Academics and religious scholars continue to debate the authenticity of Sister Agnes’s case. Some argue it was a psychosomatic illness exacerbated by psychological stressors; others maintain that it could be evidence of genuine demonic activity. The case remains an important subject for discussions on religious beliefs and paranormal phenomena in modern times.

Frequently Asked Questions

Q: Did any medical tests confirm the nature of Sister Agnes’s condition?

A: While no definitive medical tests were conducted to prove or disprove demonic possession, Dr. Charles Dugas did examine a black object expelled from Sister Agnes’s mouth during the exorcism. His report described it as rubber-like in consistency but did not provide an explanation for its presence.

Q: Are there any recorded instances of similar cases?

A: Similar cases have been documented throughout history, such as the 1962 case of Father Stanley Riviére and the 1738 exorcism of Mother Jeanne de Villermont. These cases often shared common themes of sudden onset, supernatural behavior, and eventual expulsion through exorcism.

Q: How did the community react to the exorcism?

A: The community reaction was mixed. Many believers in Notre Dame de Lourdes were convinced by the exorcism’s success, while skeptics questioned its validity. The case sparked widespread debate about the nature of demonic possession and the role of religion in modern society.

Q: What is the current status of Sister Agnes?

A: As of 2023, Sister Agnes continues to live as a nun at Notre Dame de Lourdes, though she no longer speaks publicly about her experiences. She remains an enigmatic figure whose case continues to intrigue both believers and skeptics.

Q: Is there any ongoing research or investigation into the case?

A: While the initial investigations concluded in 1938, the case continues to be of interest to scholars and religious studies experts. Ongoing research focuses on understanding the psychological and sociological factors that may contribute to similar cases of reported demonic possession.

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