An Angel for Satan (1966)

In 19th-century Italy, sculptor and restorer Roberto Merigi is hired by Count Montebruno to restore an ancient statue retrieved from the bottom of the lake that surrounds the village. The count explains that the statue was pushed to the lake 200 years ago and there is a legend that it is cursed. When his niece Countess Harriet Montebruno returns to the village after 15 years studying in London, to receive her heritage that is administrated by Count Montebruno, Merigi notes her resemblance to the statue and the two fall in love with each other. But soon Harriet is behaving strangely, provoking murders of superstitious locals. What is happening to Harriet?