The country's true capitals were Susa, Babylon and Ecbatana.
Professor Olmstead suggested the cistern was constructed at the same time that construction of the towers began.
The uneven plan of the terrace, including the foundation, acted like a castle, whose angled walls enabled its defenders to target any section of the external front.
With Marji dangerously refusing to remain silent at this injustice, her parents send her abroad to Vienna to study for a better life.
However, this change proves an equally difficult trial with the young woman finding herself in a different culture loaded with abrasive characters and profound disappointments that deeply trouble her.
UNESCO declared the ruins of Persepolis a World Heritage Site in 1979.
The site includes a 125,000 square meter terrace, partly artificially constructed and partly cut out of a mountain, with its east side leaning on Rahmat Mountain.
Major tunnels for sewage were dug underground through the rock.
A large elevated water storage tank was carved at the eastern foot of the mountain.
Darius I ordered the construction of the Apadana and the Council Hall (Tripylon or the "Triple Gate"), as well as the main imperial Treasury and its surroundings.
These were completed during the reign of his son, Xerxes I.
Archaeological evidence shows that the earliest remains of Persepolis date back to 515 BC.