Great Ziggurat, Calah (Nimrud), Iraq, 1977. Ziggurats were temple towers of terraced pyramid form built by the ancient civilizations of Mesopotamia. The Assyrian city of Nimrud was the capital of Ashurnasirpal II in the 9th century BC. . The Great Ziggurat was built by his son, Shalmaneser III. (Photo by Vivienne Sharp/Heritage Images/Getty Images)
