Ecbatana was an ancient city and the capital of the Median Empire, making it the first capital of Iran. It later became the summer capital of the Achaemenid and Parthian Empires. It was also an important city during the Seleucid and Sasanian empires. It is believed that Ecbatana is located in the Zagros Mountains, the east of central Mesopotamia, on Hagmatana Hill. Ecbatana's strategic location and resources probably made it a popular site even before the 1st millennium BC. Along with Athens in Greece, Rome in Italy and Susa in Khuzestan, Ecbatana is one of the few ancient cities in the world that is still alive and important, representing the current-day Hamadan.

Darius I, commonly known as Darius the Great, was a Persian ruler who served as the third King of Kings of the Achaemenid Empire, reigning from 522 BCE until his death in 486 BCE. He ruled the empire at its territorial peak, when it included much of Western Asia, parts of the Balkans and the Caucasus, most of the Black Sea's coastal regions, Central Asia, the Indus Valley in the far east, and portions of North Africa and Northeast Africa including Egypt (Mudrâya), eastern Libya, and coastal Sudan.