The Mysterious Castle in the Carpathians (1981)

In the 1800s, a baron, who is the owner of a castle known as The Devil's Castle and who is also an obsessed opera fan, keeps the body of his favorite diva preserved in a crypt in the castle. In order to keep away potentially nosy visitors, the baron's mad-scientist assistant, invents all sorts of spooky phenomena in order to give the castle a creepy reputation.