Ziggurat

A zig·gu·rat (zg`-rt) is a temple tower of the ancient Mesopotamian valley, having the form of a terraced pyramid of successively receding stories.

Looking at the dictionary's description above, one can in the most basic ways formulate an image of what a ziggurat looked like. However, ziggurats spanned from the simplest base which a temple sat upon, to marvels of mathematics and constructions, spanning several terraced stories and topped with a temple fit for any God.

Marduk Ziggurat (Tower of Babel), Babylon