Lust for a Vampire (1971) on Netflix

In the deserted chapel at Karnstein castle, Count [Mike Raven] and Countess Karnstein [Barbara Jefford] conduct a satanic ceremony to resurrect the body of their daughter Mircalla. Richard LeStrange [Michael Johnson] has come to the village to get background for his books about witches, vampires and black magic. Warned to beware of Karnstein castle, he takes no heed. Immediately upon entering the castle, he is set upon by three women dressed in shrouds. They turn out to be students on an educational tour from Miss Simpson's [Helen Christie] fashionable finishing school. As LeStrange is being introduced to Miss Simpson and her students, a new student arrives, one Mircalla Herritzen [Yutte Stensgaard]. LeStrange falls in love immediately.