Where was Marriage Italian-Style filmed?

1964 film by Vittorio De Sica

Marriage Italian-Style (1964) was filmed in Naples, Torre del Greco, San Sebastiano al Vesuvio and Agnano, 4 places named in its Italian Wikipedia’s Riprese 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