Where was Sunday Lovers filmed?

1980 anthology film by 4 different directors: Bryan Forbes, Gene Wilder, Dino Risi, Edouard Molinaro

Sunday Lovers (1980) was filmed in Paris, London, Rome and Los Angeles, 4 places named in its Japanese Wikipedia’s 略歴・概要 section, in France, Italy, the United States, the United Kingdom. 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