They were built because they worshiped their Gods. Then in order to keep their Gods happy they believed in human sacrifices
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.
on raised platforms
They were build about in 1854
for a cities patron god
2600 b.C.
YES
In the 3000s BCE.
They where built as temples