Gǔxīlà de xǔduō chéngbāng dōu xiūjiàn le wèichéng, yònglái fángyù hé jìsì.
Many ancient Greek city-states built an acropolis for defense and worship.
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卫 'to guard' + 城 'walled town': the fortified hilltop of an ancient Greek city. Said on its own it usually means the Acropolis of Athens, in full 雅典卫城.