https://www.imdb.com/title/tt0067513/

Eye in the Labyrinth (1972)
6.1/10 from 402 users Updated : 2019-03-27
Mystery , Thriller
Rosemary Dexter , Adolfo Celi , Horst Frank , Sybil Danning , Franco Ressel , Michael Maien , Benjamin Lev , Gigi Rizzi , Peter Kranz ,
Gaetano Donati , Elisa Mainardi , Mario Cantatore , Rosita Torosh , Alida Valli
Mario Caiano
IMDB 95
1972
A woman searches for her missing lover| a psychiatrist who has suddenly vanished for no apparent reason. She ends up at a villa poted by a group of
eccentric individuals. A string of murders commence immediately.