Where was Tanya filmed?
1940 film by Grigori Aleksandrov
Tanya (1940) was filmed in Noginsk and Trinity Lavra of St. Sergius, 2 places named in its Wikipedia article's Production 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 Wikipedia's Production section
Wikipedia’s Production section names 2 places. Each links to the sentence that says so.

