The Persian Empire is an ancient and great Empire in history as many kings as rulers with progress kingdom ruled honestly in Pars Land as 2500 years before Christ. Also as the name of Parsian Empire as the Great Empire in the ancient world, at its greatest territorial extent under Darius I (R. 522–486 BCE), held sway over territory stretching from the Indus River Valley to southeastern Europe and from the western edge of the Himalayas to northeast Africa.