Editing Les Diaboliques (film) (section)

===Filming===
The filming began on August 18, 1954 and finished on November 30 the same year.<ref name=":0" /> Clouzot asked his assistant Michel Romanoff to find a suitable filming location for the boarding school. The latter discovered a decrepit chateau in [[L'Étang-la-Ville|L'Etang-la-Ville]] between Saint-Cloud and the [[Bois de Boulogne|Bois-du-Boulogne]].<ref name=":1">{{Cite web|url=https://www.nouvelobs.com/cinema/20171027.OBS6631/les-diaboliques-histoire-d-un-tournage-electrique.html|title=Les Diaboliques", histoire d'un tournage électrique|last=Loison|first=Guillaume|date=2017-11-07|website=L'Obs|access-date=2019-11-19}}</ref> The building and its surroundings matched the director's vision perfectly since they projected the desired mood of decay and neglect. The adjacent swimming pool was dirty and full of slime. Clouzot spent five weeks shooting at this location.{{sfn|Hayward|2005|p=20}}

The screenplay placed Nicole's house in Niort, but the actual house used for filming was in [[Montfort-l'Amaury]], just opposite the building that previously appeared in Clouzot's ''[[Le Corbeau]]''. The morgue scenes were shot in the Institut Médico-légal in Paris. The rest was filmed at Saint-Maurice Studios southeast of Paris which took  an additional nine weeks.{{sfn|Hayward|2005|p=20}}

The cinematographer, [[Armand Thirard]], used two camera crews to speed up the shooting that was falling behind schedule. Despite his efforts, the filming took twice longer than the projected 48 days.{{sfn|Hayward|2005|pp=20–21}}

Originally the film was to be called ''Les Veuves'' (''The Widows'') but this was deemed unmarketable. Eleven weeks into filming it was changed to ''Les Démoniaques''.{{sfn|Hayward|2005|p=13}} Eventually it was renamed ''Les Diaboliques'' but this title was already used for [[Les Diaboliques (short story collection)|a collection of short stories]] by the 19th-century writer [[Jules Barbey d'Aurevilly|Barbey d'Aurevilly]]. Clouzot was permitted to use this title but only on the condition that he give the author a proper mention.{{sfn|Hayward|2005|p=13}} He did it by opening the film with a quote from the preface to d'Aurevilly's work: "A portrait is always moral when it is tragic and shows the horror of the things it represents."<ref>{{Cite book|title=Framed: Lesbians, Feminists, and Media Culture|last=Mayne|first=Judith|year=2000|publisher=University of Minnesota Press|isbn=0816634564|location=Minneapolis|page=49|oclc=43555067}}</ref>