Question: "Who was Cyrus in the Bible?"
Answer from GotQuestions: Cyrus is a king mentioned more than 30 times in the Bible and is identified as Cyrus the Great (also Cyrus II or Cyrus the Elder) who reigned over Persia between 539—530 BC. This pagan king is important in Jewish history because it was under his rule that Jews were first allowed to return to Israel after 70 years of captivity.
In one of the most amazing prophecies of the Bible, Isaiah predicts Cyrus’ decree to free the Jews. One hundred fifty years before Cyrus lived, the prophet calls him by name and gives details of Cyrus’ benevolence to the Jews: “This is what the Lord says to his anointed, to Cyrus, whose right hand I take hold of to subdue nations before him . . . ‘I summon you by name and bestow on you a title of honor, though you do not acknowledge me’” (Isaiah 45:1, 4; see also 41:2-25; 42:6). Evincing His sovereignty over all nations, God says of Cyrus, “He is my shepherd and will accomplish all that I please” (Isaiah 44:28).
Cyrus’s decree releasing the Jewish people, in fulfillment of prophecy, is recorded in 2 Chronicles 36:22–23: “Now in the first year of Cyrus king of Persia, that the word of the LORD by the mouth of Jeremiah might be fulfilled, the LORD stirred up the spirit of Cyrus king of Persia, so that he made a proclamation throughout all his kingdom and also put it in writing: ‘Thus says Cyrus king of Persia, “The LORD, the God of heaven, has given me all the kingdoms of the earth, and he has charged me to build him a house at Jerusalem, which is in Judah. Whoever is among you of all his people, may the LORD his God be with him. Let him go up.”’” Other Old Testament books that mention Cyrus include Ezra and Daniel.
King Cyrus actively assisted the Jews in rebuilding the temple in Jerusalem under Ezra and Zerubbabel. Cyrus restored the temple treasures to Jerusalem and allowed building expenses to be paid from the royal treasury (Ezra 1:4–11; 6:4–5). Cyrus’s beneficence helped to restart the temple worship practices that had languished during the 70 years of the Jews’ captivity. Some commentators point to Cyrus’s decree to rebuild Jerusalem as the official beginning of Judaism.
Among the Jews deported from Judah and later placed under the rule of Cyrus include the prophet Daniel. In fact, we are told Daniel served until at least the third year of King Cyrus, approximately 536 BC (Daniel 10:1). That being the case, Daniel likely had some personal involvement in the decree that was made in support of the Jews. The historian Josephus says that Cyrus was informed of the biblical prophecies written about him (Antiquities of the Jews, XI.1.2). The natural person to have shown Cyrus the scrolls was Daniel, a high-ranking official in Persia (Daniel 6:28).
Besides his dealings with the Jews, Cyrus is known for his advancement of human rights, his brilliant military strategy, and his bridging of Eastern and Western cultures. He was a king of tremendous influence and a person God used to help fulfill an important Old Testament prophecy. God’s use of Cyrus as a “shepherd” for His people illustrates the truth of Proverbs 21:1, “The king's heart is in the hand of the LORD; he directs it like a watercourse wherever he pleases.”
Recommended Resources: The Great Lives from God's Word Series by Chuck Swindoll and Logos Bible Software.

Achaemenid (Ancient Persian) Dynasty

  • 559-530-Cyrus the Great
  • 529-522- Cambyses (son)
  • 522- Smerdis (Bardiya) (brother)
  • 521-486-Darius I, the Great
  • 485-465- Xerxes I (son)
  • 464-424- Artaxerxes I, Longimanus (son)
  • 424- Xerxes II(son)
  • 424- Sogdianus (brother)
  • 423-405- Darius II, Nothus (brother)
  • 404-359- Artaxerxes II, Mnemon (son)
  • 358-338- Artaxerxes III (Ochus) (son)
  • 337-336- Artaxerxes IV ( Arses) (son)
  • 335-330-Darius III(Codomannus) (great-grandson of Darius II)

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Two days later, on October 7 (proleptic Gregorian calendar), Gubaru's troops entered Babylon, again without any resistance from the Babylonian armies, and detained Nabonidus.[61]Herodotus explains that to accomplish this feat, the Persians, using a basin dug earlier by the Babylonian queen Nitokris to protect Babylon against Median attacks, diverted the Euphrates river into a canal so that the water level dropped "to the height of the middle of a man's thigh", which allowed the invading forces to march directly through the river bed to enter at night.[62] On October 29, Cyrus himself entered the city of Babylon and detained Nabonidus.[63]

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Question: "What was the Babylonian captivity/exile?"
Answer from GotQuestions.org: The Babylonian captivity or exile refers to the time period in Israel’s history when Jews were taken captive by King Nebuchadnezzar II of Babylon. It is an important period of biblical history because both the captivity/exile and the return and restoration of the Jewish nation were fulfillments of Old Testament prophecies.
God used Babylon as His agent of judgment against Israel for their sins of idolatry and rebellion against Him. There were actually several different times during this period (607-586 B.C.) when the Jews were taken captive by Babylon. With each successive rebellion against Babylonian rule, Nebuchadnezzar would lead his armies against Judah until they laid siege to Jerusalem for over a year, killing many people and destroying the Jewish temple, taking captive many thousands of Jews, and leaving Jerusalem in ruins.
As prophesied in Scripture, the Jewish people would be allowed to return to Jerusalem after 70 years of exile. That prophecy was fulfilled in 537 B.C., and the Jews were allowed by King Cyrus of Persia to return to Israel and begin rebuilding the city and temple. The return under the direction of Ezra led to a revival among the Jewish people and the rebuilding of the temple.
Under the reign of King Nebuchadnezzar II, the Babylonian Empire spread throughout the Middle East, and around 607 B.C., King Jehoiakim of Judah was forced into submission, becoming a vassal to Nebuchadnezzar (2 Kings 24:1). It was during this time that Nebuchadnezzar took many of the finest and brightest young men from each city in Judah captive, including Daniel, Hananiah (Shadrach), Mishael (Meshach) and Azariah (Abednego). After three years of serving Nebuchadnezzar, Jehoiakim of Judah rebelled against Babylonian rule and once again turned to Egypt for support. After sending his army to deal with Judah’s revolt, Nebuchadnezzar himself left Babylon in 598 B.C. to deal with the problem. Arriving in Jerusalem around March of 597 B.C., Nebuchadnezzar laid siege to Jerusalem, taking control of the area, looting it, and taking captive with him Jehoikim’s son, Jehoiachin, his family, and almost all of the population of Judah, leaving only the poorest people of the land (2 Kings 24:8-16).
At that time Nebuchadnezzar appointed King Zedekiah to rule as his representative over Judah, but after nine years and still not having learned their lesson, Zedekiah led Judah in rebellion against Babylon one final time (2 Kings 24–25). Influenced by false prophets and ignoring Jeremiah’s warnings, Zedekiah decided to join a coalition that was being formed by Edom, Moab, Ammon and Phoenicia in rebellion against Nebuchadnezzar (Jeremiah 27:1-3). This resulted in Nebuchadnezzar again laying siege to Jerusalem. Jerusalem fell in July 586 B.C., and Zedekiah was taken captive to Babylon after seeing his sons killed before him and then having his eyes plucked out (2 Kings 25). At this time Jerusalem was laid to waste, the temple destroyed and all the houses burned. The majority of the Jewish people were taken captive, but, again, Nebuchadnezzar left a remnant of poor people to serve as farmers and vinedressers (2 Kings 25:12).
The books of 2 Chronicles and 2 Kings deal with much of the time leading up to fall of both the Northern Kingdom and Judah. They also cover the destruction of Jerusalem by Nebuchadnezzar and the beginning of the Babylonian captivity. Jeremiah was one of the prophets during the time leading up to the fall of Jerusalem and the exile, and Ezekiel and Daniel were written while the Jews were in exile. Ezra deals with the return of the Jews as promised over 70 years before by God through the prophets Jeremiah and Isaiah. The book of Nehemiah also covers the return and rebuilding of Jerusalem after the exile was over.
The Babylonian captivity had one very significant impact on the nation of Israel when it returned to the land—it would never again be corrupted by the idolatry and false gods of the surrounding nations. A revival among Jews took place after the return of the Jews to Israel and the rebuilding of the temple. We see those accounts in Ezra and Nehemiah as the nation would once again return to the God who had delivered them from their enemies.
Just as God had promised through the prophet Jeremiah, God judged the Babylonians for their sins, and the Babylonian Empire fell to the armies of Persia in 539 B.C., once again proving God’s promises to be true.
The seventy-year period of the Babylonian captivity is an important part of Israel’s history, and Christians should be familiar with it. Like many other Old Testament events, this historical account demonstrates God’s faithfulness to His people, His judgment of sin, and the surety of His promises.
Recommended Resources: Bible Answers for Almost all Your Questions by Elmer Towns and Logos Bible Software.