Why was Constantinople's name changed to Istanbul?

Related questions

1. What are the Byzantine manuscripts?
2. What are the characteristics of Byzantine architecture?
3. What was the Byzantine empire known for?
4. Why is Ravenna home to Byzantine architecture?
5. Was the Byzantine Empire Orthodox?
6. What is Byzantine time?
7. What did the Byzantines call their empire?
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Tags

1. #empire
2. #finally
3. #angora
4. #republic
5. #turkey
6. #ankara
7. #capital
8. #collapsed
9. #istanbul
10. #lasting
11. #constantinople
12. #calling
13. #travelers
14. #businesses
15. #governments
16. #changed
17. #officially
18. #foreign
19. #ottoman