In TSFS, a Starfleet Officer mentioned the city Lenningrad.
Chekov also made reference to a Leningrad. The way things are going in Russia today perhaps they changed the city's name from Saint Petersburg back to Leningrad again.
Leningrad was also mentioned in the movie The Voyage Home.
By that reasoning, the Lakota nation must likewise exist: USS Crazy Horse, USS Lakota. Likewise, the Byzantine Empire must exist: USS Constantinople
Yes those ships exist, but where were they built