Why did the ancient Greeks build the Acropolis of Athens on a high hill?

The ancient Greeks built the Acropolis of Athens on a high hill for both religious and military reasons. As a central, defensively oriented district, the acropolis served as a citadel, making it easier to defend the city. Religiously, hills were seen as imbued with natural mysteries, signifying the presence of gods. The Acropolis of Athens, dedicated to Athena, the city's patron goddess, was constructed in the second half of the 5th century BCE. This elevated location provided a sacred space for temples and municipal buildings, housing the city's chief religious and civic structures.123