Where was The Franciscan Friars of Killarney filmed?
1911 film by Sidney Olcott
The Franciscan Friars of Killarney (1911) was filmed in Killarney and Beaufort, 2 places named in its Wikipedia article, in Ireland. 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.

