Why is Lhasa known as the Forbidden City?

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Tags

1. #means
2. #originally
3. #otang
4. #forbidden
5. #called
6. #would
7. #stirred
8. #world
9. #lhasa
10. #rasala
11. #because
12. #water
13. #literally
14. #built
15. #place
16. #tibet
17. #sound