Who founded the Achaemenid Persian Empire, around 600-530 BC?

• A. Darius I
• B. Nebuchadnezzar II
• C. Alexander the Great
• D. Cyrus the Great

Answer: (D)

Recognizing who established the Achaemenid Empire is key. Cyrus the Great, or Cyrus II, founded the empire in the mid-6th century BCE by uniting the Persian tribes and Media and launching conquests that brought Lydia and Babylonia under one rule. That act of unification and expansion created the vast, multi-ethnic empire that would be ruled by the Achaemenid dynasty. Later rulers like Darius I are known for organizing and extending the empire, but not for founding it. Nebuchadnezzar II was a king of the Neo-Babylonian Empire who ruled before Cyrus, not a founder of the Achaemenid state. Alexander the Great conquered the empire centuries later and marked the end of the Achaemenid era, rather than its origin. So Cyrus the Great is the founder.