They were built because they worshiped their Gods. Then in order to keep their Gods happy they believed in human sacrifices
the Mayan temples were built when the mayans felt like building them
no one truly knows the mayans were quite a mysterious civilization.
Well, first of all, it wasn't built. It was designed and carved after the study of the sky and its celestial patterns. Also, it was "built" throughout the entire reign of the Mayans.
Aliens don't exist.
Ziggurats were first built by the Summerians in 5200 BCE.
Sumerian Ziggurats were built to honor how the gods descended to earth.
The Sumerians built the ziggurats to please and respect their gods.
Babyionians
The Mesopotamians famously built ziggurats.
The first Ziggurat at Ur was built by King Ur-Nammu, a ruler of the ancient city-state of Ur in Mesopotamia around 2100 BC. He constructed the Great Ziggurat of Ur as a temple dedicated to the moon god Nanna.
The Sumerians were the civilization that built ziggurats and used cuneiform to record information. Ziggurats were a form of stepped pyramid temple used for religious purposes, while cuneiform was a system of writing using wedge-shaped characters inscribed on clay tablets.
on raised platforms
They were build about in 1854
In the 3000s BCE.
for a cities patron god
YES