Where and when was Gregorian chant composed?

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Tags

1. #replaced
2. #itself
3. #chant
4. #tradition
5. #imported
6. #century
7. #notated
8. #which
9. #instead
10. #centuries
11. #roman
12. #gregorian
13. #manuscripts
14. #virtually
15. #emperors
16. #german
17. #italy
18. #during
19. #being
20. #eventually
21. #known
22. #musical
23. #local
24. #popes