In which city was the tallest structure of the Ancient Mesopotamia?

The tallest structure of Mesopotamia in ancient times was in the city of Babylon and was called Etemenaki – the house of the foundation of heaven and earth. By the time of Hammurabi’s rule in the 18th century BC. e. it already existed. This structure was a classic ziggurat, and after reconstruction in the 7th century BC.  its height was 91 meters. It was this ziggurat that served as a possible prototype for the biblical Tower of Babel, which was built by people to become famous. Without allowing this, God created different languages to make it difficult for the builders to communicate.