Where was Thirty Three filmed?
1965 film by Georgiy Daneliya
Thirty Three (1965) was filmed in Rostov Veliky, 1 place named in its Ukrainian Wikipedia’s Цікаві факти section, in Russia. 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.
Places per Ukrainian Wikipedia's Цікаві факти section
Ukrainian Wikipedia’s Цікаві факти section names 1 place. Each links to the sentence that says so.

