Ziggurats functioned as platforms for temples, symbolizing a bridge between the earth and the heavens. The towers’ design was composed of stacked rectangular platforms, each growing in size the higher the tower got, showcasing a stepped appearance (https://theconversation.com/in-ancient-mesopotamia-what-was-a-ziggurat-268658).

They were built in Ancient Mesopotamia from 4,000 BCE to 500 BCE. The temple towers represented a significant advancement in architecture. They were built using mud bricks, with the reinforcement of fired bricks to keep the towers stable. The construction of ziggurats marked a leap in the architectural marvel of Mesopotamia, as it led to the concept of multi-level buildings (https://www.worldhistory.org/ziggurat/).

For example, a famed piece of architecture includes the Great Ziggurat of Ur. It was built in 2100 BCE during the Early Bronze Age by King Ur-Nammu of the Third Dynasty of Ur as a massive stepped temple complex dedicated to Nanna, the Sumerian moon God (https://smarthistory.org/ziggurat-of-ur/).

Overall, ziggurats were a key architectural advancement to Mesopotamian society, as they advanced architectural practices and served as religious symbols, and today draw visitors and scholars, linking the spiritual and civic life of early urban civilizations.