Respuesta :
For the Greeks (or more particularly the Athenians) any system which excluded power from the whole citizen-body and was not a tyranny or monarchy was described as anoligarchy. Oligarchies were perhaps the most common form of city-state government and they often occurred when democracy went wrong.
Answer:
The structure was the walls of Greece
Explanation:
It is a structure, I really don't know the answer. So I'm no help but that's my best guess