The House of Exorcism is a 1975 English-language Horror Mystery film directed by Mario Bava, Alfredo Leone and Lamberto Bava and produced by Alfredo Leone. Tourist Lisa Reiner faints on the street and is taken to hospital. She shows disturbing sings of demonic possession, so a priest, Father Michael, is brought in to perform an exorcism. However, he first tries to investigate how she became possessed by the devil in the first place. Despite the fact that her personality has now completely blended together with the demonic entity within her, she none the less tells him about the horrific experiences she lived through in the mansion of a twisted Spanish aristocratic family with a dark secret and the devil she met there. The house of exorcism stars Telly Savalas in the title role along with an ensemble cast including Elke Sommer, Sylva Koscina, Alessio Orano, Gabriele Tinti, Kathleen Leone and Eduardo Fajardo. The screenplay is written by Alberto Cittini and Alfredo Leone:84. The music was composed by Carlo Savina:84. Cinematography was done by Cecilio Paniagua:84 and editing by Carlo Reali:84. The motion picture has a running time of 91-85. It was released on 2nd April 1975. Distribution rights for the motion picture were acquired by Transeuropa:85.