Where was The Redeemer: Son of Satan filmed?

1978 film

The Redeemer: Son of Satan (1978) was filmed in Staunton, Mary Baldwin University and Staunton Military Academy, 3 places named in its Wikipedia article, in the United States. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data

Places per Wikipedia's article

The Wikipedia article names 3 places. Each links to the sentence that says so.