What is St Petersburg Russia famous for?

Tags

1. #saint
2. #important
3. #historical
4. #often
5. #because
6. #unique
7. #russia
8. #centuries
9. #called
10. #petersburg
11. #venice
12. #north
13. #peter
14. #established
15. #events
16. #great
17. #capital
18. #witnessed
19. #architecture