Ziggurat of Choga Zanbil magnificent ruins

Ziggurat is a type of massive structure built in ancient Mesopotamia. They were built by ancient Sumerians, Akkadians, Elamites, Eblaites and Babylonians for local religions, predominantly Mesopotamian religion and Elamite religion. Ziggurats have the form of a terraced compound of successively receding stories or levels. They were the site of keeping statues of gods and performing religious ceremonies.