Friday 23rd of May 1941 (x) — Doctor and serial killer Marcel Petiot buys a property from Marie-Sidonie Desmit, wife of Joseph Marie Rodolphe, Prince of Colloredo Mannsfield
Petiot paid 495.000,- Francs. He killed between 27 (confirmed) and 64 (presumed) people in this 'hôtel'.
Friday 2nd of January 1942 (-) — Victim of Marcel Petiot aka The Triangular Chamber of Death Murderer Joachim Guschinow is murdered by Marcel Petiot aka The Triangular Chamber of Death Murderer
Saturday 20th of June 1942 (-) — Victim of Marcel Petiot aka The Triangular Chamber of Death Murderer Paul Braunberger is murdered by Marcel Petiot aka The Triangular Chamber of Death Murderer
Sunday 22nd of March 1942 (-) — Victim of Marcel Petiot aka The Triangular Chamber of Death Murderer Jean-Marc Van Bever is murdered by Marcel Petiot aka The Triangular Chamber of Death Murderer
Friday 5th of June 1942 (-) — Victim of Marcel Petiot aka The Triangular Chamber of Death Murderer Denise Hotin is murdered by Marcel Petiot aka The Triangular Chamber of Death Murderer
Hotin went to see Dr. Petiot to have an abortion.
Thursday 16th of July 1942 (-) — Victim of Marcel Petiot aka The Triangular Chamber of Death Murderer Kurt Kneller is murdered by Marcel Petiot aka The Triangular Chamber of Death Murderer
Wednesday 25th of March 1942 (-) — Victim of Marcel Petiot aka The Triangular Chamber of Death Murderer Marthe Khait is presumably murdered by Marcel Petiot aka The Triangular Chamber of Death Murderer
Friday 17th of July 1942 (-) — Victim of Marcel Petiot aka The Triangular Chamber of Death Murderer Greta Kneller is presumably murdered by Marcel Petiot aka The Triangular Chamber of Death Murderer
Saturday 11th of March 1944 (x) — Discovery of human remains from at least 20 bodies in the basement of Doctor and serial killer Marcel Petiot
Petiot's neighbors in Rue Le Sueur complained to police of a foul stench in the area and of large amounts of smoke billowing from a chimney of the house. Fearing a chimney fire, the police summoned firemen, who entered the house and found a roaring fire in a coal stove in the basement.
Friday 24th of February 2006 — The Eyes Had it: The Rue Le Sueur where Serial Killer Dr. Marcel Petiot killed about 63 people at n° 21 (the original building however was torn down) in his infamous 'Triangular Chamber of Death', before and during WWII