EP180: Serial Killer Nun: Holy Hellhouse

EP180: Serial Killer Nun: Holy Hellhouse

From Psychopedia by Investigator Slater

April 22, 2026 · 1h 12m · Episode 180

About this episode

The episode explores the dark history of Abbess Mariam, a notorious female serial killer who abused her authority in a religious setting.

Abbess Mariam, better known as “Mother Rasputin,” has been described as one of the most prolific female serial killers in modern history. She cloaked herself in the authority of a Greek Old Calendarist Orthodox abbess while running something far darker than a monastery. Between 1939 and 1950, she was found guilty of a staggering range of crimes, including multiple murders and fraud, but the charges barely capture the reality inside her compound in Keratea, Greece. Hundreds of people - mostly women - arrived there seeking refuge, faith, and safety, and instead found solitary confinement, empty plates, and discipline that escalated into ritualized cruelty. Mariam ruled with a mix of spiritual theater and calculated brutality, presenting herself as divinely guided while systematically breaking down (and killing) the very people who trusted her. Sadistic, controlling, and untethered from any moral boundary, she has been described as one of the most prolific female serial killers in modern history. FOLLOW AND SUBSCRIBE to Psychopedia wherever you are listening! Follow Investigator Slater on Instagram + TikTok: @investigatorslater Join our Patreon family…

People in this episode

Host: Investigator Slater

Topics covered

  • female serial killers
  • true crime
  • religious authority
  • abuse
  • historical crimes

Keywords

  • serial killer
  • Abbess Mariam
  • Mother Rasputin
  • true crime
  • Greece
  • historical crimes
  • abuse
  • religious authority

Mentioned in this episode

Places: Greece, Keratea

More episodes of Psychopedia

Explore listener stats, chart rankings, contacts and more on the Psychopedia podcast page.