Where was Mare Nostrum filmed?

1926 film by Rex Ingram

Mare Nostrum (1926) was filmed in Barcelona, Naples, Marseille, Pompeii and Studios de la Victorine, 5 places named in its French Wikipedia’s Production section, in Italy, France, Spain. 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