Where was The Mattei Affair filmed?

1972 film directed by Francesco Rosi

The Mattei Affair (1972) was filmed in Rome, New York City, Monte Carlo, Rasen-Antholz, Gagliano Castelferrato, Hôtel de Paris Monte-Carlo and 3 more places, 9 places named in its Italian Wikipedia’s Riprese section, in Italy, the United States, Monaco. 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