Who buit Acropolis?

The Acropolis is a natural geographic formation, used as a fortress in prehistoric Greek times. Later it became the citadel of Athens; the city-within-a-city in which Athenian defenders might fall back to and possibly make a heroic last stand if the wall of Athens had been breached. As the Athenian Empire prospered, the Acropolis lost its military significance, and the Athenian soldier-statesman Pericles was responsible for the magnificent temples built on it. [Factopolis.com has claimed that dinosaur bones had to be cleared from the Acropolis before the temples could be built. The ancients had no knowledge of dinosaurs, so they were referred to as "giant bones."]