What do the ziggurats tell us about Sumerian society?

Ziggurats tells us that sumerians believe in god and that the priest goes to the top to worship them.

The ziggurat was built to honor the main god of the city. The tradition of building a ziggurat was started by the Sumerians, but other civilizations of Mesopotamia such as the Akkadians, the Babylonians, and the Assyrians also built ziggurats.