None of them featured internal chambers, including the best-preserved example, found in Ur.
The most famous legendary example was called Etemenanki, while the one of Borsippa was destroyed by a fire caused by its support system of reed matting and bitumen. The one at Chogha Zanbil is the largest of the 25 that have been discovered, some of which featured triple sets of stairs or spiral ramps for ascent. None of them featured internal chambers, including the best-preserved example, found in Ur. FTP, what were these pyramid-shaped temples of Mesopotamia?
The most famous legendary example was called Etemenanki, while the one of Borsippa was destroyed by a fire caused by its support system of reed matting and bitumen.
ziggurat