Where was Francis of Assisi filmed?
1961 film by Michael Curtiz
Francis of Assisi (1961) was filmed in Perugia, Bevagna and Cascate di Monte Gelato, 3 places named in its Wikipedia article, in Italy. 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 3 places. Each links to the sentence that says so.

