What is Russia's major religion?

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Tags

1. #catholicism
2. #russia
3. #orthodox
4. #judaism
5. #population
6. #religion
7. #largest
8. #multi
9. #professed
10. #christian
11. #nation
12. #faith
13. #belonging
14. #protestantism
15. #buddhism
16. #ethnic
17. #islam
18. #christianity
19. #denomination