Ziggurats in Mesopotamia
Like the pyramids of Egypt,the towers called “ziggurats”built in ancient Mesopotamia were monumental symbols of a great civilization.Ziggurats consisted of several levels or platforms of diminishing sizes with exterior stairways or ramps leading to their summits.New platforms were built on top of older ones over many centuries,leaving earlier stages buried under later enlargements.The Egyptian pyramids,however,were never meant to be climbed,and new pyramids were not built over the remains of older ones.
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