Nabonidus, last king of king of Babylonia, in relief showing him praying to the moon, sun and Venus; slab in the British Museum.
On October 29, Cyrus himself entered the city of Babylon and arrested Nabonidus, the last king of the Neo-Babylonian Empire.
Before the invasion of Babylon, Cyrus had conquered many kingdoms. Apart from Babylon, Cyrus probably incorporated its subnational entities of his Empire, including Syria, Judea and Arabia Petraea, although no direct evidence of this fact was found.
Lands that Cyrus the Great united under Persian rule.
After taking Babylon, Cyrus the Great appointed himself as "king of Babylon, king of Sumer and Akkad, king of the four corners of the world" in the famous Cyrus Cylinder.
Slavery was abolished by Cyrus the Great after conquering Babylon around ~540 BC.
Cyrus was proclaimed in a cyllinder inscription placed in the foundations of the temple Esagila dedicated to the chief of Babylon and its god Marduk.
The text of the cylinder denounces Nabonidus as impious and portrays the victorious campaign of Cyrus to please the god Marduk. It describes how Cyrus had improved the lives of the citizens of Babylonia, repatriated displaced peoples and restored temples and shrines of worship. Although some have claimed that the cylinder is a form of human rights charter, historians generally portray the context of a Mesopotamian tradition of long standing.
The Persian Empire under Cyrus the Great. http://aclassicaday.blogspot.com.co/2011/11/fall-of-croesus.html
The domains of Cyrus the Great make up the largest empire the world had seen. At the end of the regime of Cyrus, the Achaemenid Empire stretched from Asia Minor in the west to northwest areas of India in the east.