Mesopotamian architecture is characterized by its use of mud bricks, which were abundant in the region. The most notable structures include ziggurats, which are massive stepped temples dedicated to the gods. These buildings often featured a central shrine at the top and were designed to connect the earth with the heavens. In addition to ziggurats, Mesopotamian cities like Babylon and Ur showcased impressive palaces and city walls. The architecture reflected the social hierarchy, with larger and more elaborate buildings for the elite. Decorative elements, such as reliefs and glazed bricks, were commonly used to enhance the visual appeal of these structures.