Where was The Prisoner of Zenda filmed?

1979 film by Richard Quine

The Prisoner of Zenda (1979) was filmed in Klosterneuburg, Krems, Schönbrunn Palace, Innere Stadt, Laxenburg, Salzburg Cathedral and 3 more places, 9 places named in its Wikipedia article, in Austria. 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