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  1. Constantinople - Wikipedia

  2. Constantinople - Facts, Summary, & Significance | HISTORY

  3. Constantinople - World History Encyclopedia

  4. Fall of Constantinople | Facts, Summary, & Significance

  5. 1453: The Fall of Constantinople - World History Encyclopedia

  6. Constantinople - New World Encyclopedia

  7. Istanbul - Crossroads, Bosphorus, Byzantium | Britannica

  8. The Great Palace of Constantinople - World History Encyclopedia

  9. Constantinople - Wikiwand

  10. Constantinople: Capital of the Eastern Roman Empir - ThoughtCo