different between byzantium vs istambul

byzantium

byzantium From the web:

• what does byzantium mean
• what if byzantium never fell
• what if byzantium won manzikert
• what is byzantium called today
• what does byzantium symbolize
• what was byzantium called before
• what if byzantium won 1453
• what is byzantine known for

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istambul

istambul From the web:

• what istanbul means
• what istanbul famous for
• what istanbul airport
• what to do in istanbul
• visit istanbul
• istanbul time
• what does istanbul
• what does istanbul mean in english