Attack of the Blind Dead (movie, 1973)

500 years after they were blinded and executed for committing human sacrifices, a band of Templar knights returns from the grave to terrorize a rural Portuguese village during it's centennial celebration. Being blind, the Templars find their victims through sound, usually the screams of their victims. Taking refuge in a deserted cathedral, a small group of people must find a way to escape from the creatures.