Il mostro dell'opera
- Tahun: 1964
- Negara: Italy
- Genre: Horror, Thriller
- Studio: Nord Industrial Film
- Kata kunci: rome, italy, vampire, reincarnation, broken mirror, dance company, lesbian, vampiress (female vampire), theatre
- Pengarah: Renato Polselli
- Pelakon: Marco Mariani, Giuseppe Addobbati, Barbara Howard, Alberto Archetti, Carla Cavalli, Aldo Nicodemi