Greater Iran
The term "Greater Iran", in addition to the modern state of Iran, includes all of the territory ruled by various Iranian peoples throughout history, including in Mesopotamia, eastern Anatolia, the Caucasus and Central Asia. The concept of Greater Iran has its source in the history of the Achaemenid Persian Empire in the region of Persis (modern-day Fars Province, Iran), and overlaps to a certain extent with the history of Iran proper.