Where was Assunta Spina (1915) filmed?

1915 film by Francesca Bertini and Gustavo Serena

Assunta Spina (1915) was filmed in Procida, Nisida, Bagnoli and Coroglio, 4 places named in its Italian Wikipedia’s Produzione section, 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.

See them on the map → Wikipedia Source data

Places per Italian Wikipedia's Produzione section

Italian Wikipedia’s Produzione section names 4 places. Each links to the sentence that says so.