Where was The Magic Flute filmed?
1975 film by Ingmar Bergman
The Magic Flute (1975) was filmed in Drottningholm Palace and Swedish Film Institute, 2 places named in its Wikipedia article, in Sweden. 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.
Places per Wikipedia's article
The Wikipedia article names 2 places. Each links to the sentence that says so.

