The ancient civilization known for building ziggurats in Mesopotamia is the Sumerians. These massive, tiered structures were constructed as temples dedicated to their gods and served as symbolic representations of the connection between heaven and earth. Ziggurats were often built in the center of city-states, reflecting the importance of religion in Sumerian society. Their architectural innovations influenced subsequent cultures in the region. The most famous ziggurat, the Ziggurat of Ur, showcases the technological advancements and spiritual life of the Sumerians, underscoring their role as one of the earliest civilizations in human history.