Where was Death Knocks Twice filmed?

1969 detective film directed by Harald Philipp

Death Knocks Twice (1969) was filmed in Pisa, Rosignano Marittimo, Tirrenia and Quercianella, 4 places named in its Italian Wikipedia’s Produzione 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