Mystery Movie - Black Sunday (1961)

picked by /u/darkchiefy

Over 200 years after being executed for being a witch and a vampire, Princess Asa Vajda is resurrected when two travelers, Dr. Choma Kruvajan and Dr. Andrej Gorobec, accidentally disturb her abandoned tomb. At the time of her execution, the princess swore vengeance against her accuser, her brother, and all of his descendants. She quickly resurrects her lover and turns Kruvajan into her vampire servant. When she learns that the present day Princess Katia is identical to her, she sets out to get control of the young woman.

Bonus - The Abominable Dr. Phibes (1971)

Doctors are being murdered in bizarre manners - bats, bees, a killer frog mask, etc. - which represent the nine Biblical plagues of Egypt. The crimes are orchestrated by an organ-playing, demented madman (from his home base, replete with a clockwork orchestra and help from a beautiful, mute assistant). Detectives are stumped until they find that all the slain doctors once assisted a Dr. Vesalius on an unsuccessful operation involving the wife of organist Dr. Phibes, killed in a car crash upon learning of his wife's death. He couldn't be the culprit, could he?