Possible Clues:

• Acropolis city
• Hasten to European capital
• City in NE Georgia
• Ottoman conquest of 1458
• The capital of Greece and the capital of Albania followed by the capital of Serbia
• 1896 and 2004 Olympics setting
• The short answer about foreign capital
• Hasten to a European capital
• Capital of Yugoslavia, then Serbia
• 2004 Olympics host