- HD 1080
- Runtime: 84m.
- Status: Released
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- Languages: it
- Country: Italy
- Director: Renato Polselli
- Stars: Marco Mariani, Giuseppe Addobbati, Barbara Howard, Alberto Archetti, Carla Cavalli
- keywords: rome, italy, vampire, reincarnation, broken mirror, dance company, lesbian, vampiress (female vampire), theatre
- Production_studio: Nord Industrial Film
- providers: Night Flight Plus, ARROW, Troma NOW
- The The Monster of the Opera is featured in the top rankings of 1964
- #49 in Top Thriller Movies of 1964
- #40 in Top Horror Movies of 1964
A theater troupe's young, energetic leader has secured an old theater in which to produce his new production. The theater's elderly caretaker urges the group to leave at once. A vampire is awakened and discovers that one of the troupe is the reincarnation of the woman who he once loved.