Ziggurats were massive structures built in ancient Mesopotamia, primarily by the Sumerians, Babylonians, and Assyrians. These stepped pyramids served as temples, where people worshipped their gods. Each ziggurat had a flat top, often featuring a shrine dedicated to a specific deity, and was made from mud bricks, which were abundant in the region. The design of ziggurats symbolized a connection between the earth and the heavens. They were usually built in the center of a city, showcasing the importance of religion in daily life. Today, the ruins of ziggurats, like the famous Ziggurat of Ur, provide valuable insights into ancient civilizations and their architectural achievements.