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 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 (1.78 MB) Tags: Photo Essays Credit: VIRIN: 477144-A-SMB86-151.jpg Photo Gallery