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Politics & World • Ancient history

Cyrus the Great

Cyrus the Great, also known as Cyrus II of Persia, was the founder of the Achaemenid Empire in the 6th century BCE.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 27, 2026|2 min read| Fact-checked

Cyrus the Great, also known as Cyrus II of Persia, was the founder of the Achaemenid Empire in the 6th century BCE. He expanded Persian power by conquering Media, Lydia, and Babylon, creating one of the largest empires of the ancient world. He is also remembered for allowing exiled peoples, including some Jews, to return to their homelands.

Early life and background

Cyrus was born around the early 6th century BCE, likely in Media or Persis in what is now Iran. He belonged to the Persian royal line and rose from regional ruler to major imperial founder.

Conquests and empire building

Cyrus defeated the Median Empire and later conquered Lydia and Babylon, bringing much of the ancient Near East under Persian control. His campaigns created a vast imperial system that became the basis of Achaemenid rule.

Administration and rule

Cyrus is credited with allowing local customs and administrations to continue in many conquered regions. Later traditions also portray him as a tolerant ruler who organized imperial rule efficiently.

Historical legacy

Cyrus remains an important figure in Iranian history, biblical tradition, and classical histories. He is remembered both as a military conqueror and as a ruler associated with unusual generosity toward defeated peoples.

Key facts

  • Cyrus is widely regarded as the founder of the Achaemenid Empire, often called the First Persian Empire.
  • His conquests over Media, Lydia, and Babylon helped establish Persian dominance across much of West Asia.
  • The empire under Cyrus stretched from the Aegean Sea to the Indus River and was the largest known empire of its time.
  • He is associated with a policy of relative tolerance toward conquered peoples and local religions.
  • Cyrus's capture of Babylon in 539 BCE is especially significant in Jewish history because he permitted exiles to return.

Frequently asked questions

Who was Cyrus the Great?
He was the founder of the Achaemenid Empire and one of the most powerful rulers of the ancient Near East.
Why is he called "the Great"?
The title reflects his achievements as a conqueror and empire builder, as well as later admiration for his rule.
What did Cyrus the Great conquer?
He conquered Media, Lydia, and Babylon, and extended Persian influence across a vast region.
What was Cyrus the Great's empire?
His empire was the Achaemenid Empire, also known as the First Persian Empire.
What is Cyrus the Great's connection to the Jews?
After capturing Babylon, he allowed some exiled Jews to return to Jerusalem and rebuild their temple.

References

  1. Wikipediahttps://en.wikipedia.org/wiki/Cyrus_the_Great
    Supports: Basic identification, rule, conquests, and role as founder of the Achaemenid Empire
  2. Encyclopaedia Britannicahttps://www.britannica.com/biography/Cyrus-the-Great
    Supports: Birth/death range, role as founder of the Achaemenian Empire, and empire extent
  3. World History Encyclopediahttps://www.worldhistory.org/Cyrus_the_Great/
    Supports: Conquests of Media, Lydia, and Babylonia and imperial foundations
  4. National Geographichttps://www.nationalgeographic.com/history/article/king-cyrus-the-great-bible
    Supports: Historical interpretation of Cyrus as conqueror and tolerant ruler; empire extent
  5. EBSCO Research Startershttps://www.ebsco.com/research-starters/history/cyrus-great-and-persian-empire
    Supports: Capture of Babylon and permission for Jewish return to Jerusalem