Capital Cities

What Turkish city has been the capital of three major empires: Roman, Byzantine and Ottoman?

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What is the capital of Australia?
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Which capital city has the larger population?
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What is the capital of the Emirate of Bahrain?
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What was the name of the capital of the ill-fated Republic of Biafra?
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What is the capital and largest city of Saudi Arabia?
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Buenos Aires, which translates to "fair winds", is the capital of which South American country?
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Which capital city was designed by Pierre L'Enfant?
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Which country with a total area of 572 square kilometers has Douglas as its capital city?
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