Where was Mother Joan of the Angels filmed?
1961 film by Jerzy Kawalerowicz
Mother Joan of the Angels (1961) was filmed in Józefów, 1 place named in its Polish Wikipedia’s Produkcja section, in Poland. 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 Polish Wikipedia's Produkcja section
Polish Wikipedia’s Produkcja section names 1 place. Each links to the sentence that says so.