Where was Requiem for a Secret Agent filmed?

1966 film by Sergio Sollima

Requiem for a Secret Agent (1966) was filmed in London, Rome, Marrakech and Tangier, 4 places named in its Italian Wikipedia’s Produzione section, in Morocco, the United Kingdom, 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