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World Heritage Sites: Exploring the World's Greatest PlacesThe citadel of Persepolis was the capital of the Achaemenid Empire for nearly 200 years.![True History Channel]()

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Now PlayingWorld Heritage Sites: Exploring the World's Greatest PlacesThe citadel of Persepolis was the capital of the Achaemenid Empire for nearly 200 years.0
World Heritage Sites: Exploring the World's Greatest PlacesThe moai, the colossal statues of Easter Island, are a testament to human innovation.