What was the term for the kings of Russia?

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Tags

1. #kniaz
2. #ruler
3. #commonly
4. #version
5. #terrible
6. #called
7. #grand
8. #describe
9. #russia
10. #imperator
11. #rulers
12. #finally
13. #chief
14. #crowned
15. #latin
16. #adopted
17. #prince
18. #moscow
19. #velikii
20. #known
21. #emperor
22. #russian
23. #caesar