The Persian Empire was one of the largest empires in ancient history, known for its remarkable achievements in governance, culture, and architecture. Founded by Cyrus the Great in the 6th century BCE, it spanned three continents, including parts of Asia, Africa, and Europe, and was characterized by a diverse population and a complex administrative system. At its height, the empire was renowned for its innovations, such as the use of a standardized currency and an extensive road system, which facilitated trade and communication. The Persian Empire left a lasting legacy, influencing subsequent cultures and empires, including the Roman Empire and the Byzantine Empire.