A relief in Persepolis shows Faravahar, the best-known symbols of Zoroastrians. The winged disc is influenced by the "winged sun" in Egypt and similar figures in Neo-Assyrian era. Persepolis is a 2500-year old World Heritage Site of ancient Persian palaces and temples near Shiraz in southern Iran. It was the ceremonial capital of the Persian Empire during the Achaemenid dynasty. At the height of its power, the Achaemenid Empire encompassed about 7.7 million square kilometers and spanned three continents, as far west as Libya to nearly all Middle East, and to Central Asia.