Final answer:
The city of Constantinople was renamed Istanbul to establish the capital of the Ottoman Empire.
Step-by-step explanation:
The subject of the question is history. The city of Constantinople was renamed Istanbul to establish the capital of the Ottoman Empire. The Ottoman Empire was a powerful Muslim state that controlled a vast territory in the Middle East, North Africa, and Southeast Europe. Renaming the city symbolized the shift in power and the establishment of a new empire.
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