GREAT ZIGGURAT U.S. Defense Secretary Robert Gates receives a tour of the Great Ziggurat of Ur, Iraq, Jan. 19, 2007. The ziggurat was believed to be a place of worship, dedicated to the moon god Nanna in the Sumerian city of Ur in ancient Mesopotamia. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 148779-Q-THP96-988.jpg Photo Gallery