What greek city-state was governed by an oligarchy?

many Greek city states were under a oligarchy but they always changed there "government system"

The Greeks had a lot of different kinds of governments, because there were many different city-states in ancient Greece, and they each had their own government. In addition, people's ideas about what made a good government changed over time.Aristotle divided Greek governments into monarchies,oligarchies, tyrannies and democracies, and most historians still use these same divisions. For the most part, Greece began by having monarchies, then oligarchies, then tyrannies and then democracies, but at each period there were plenty of city-states using a different system, and there were many which never did become democracies or tyrannies at all.

What he said

Opposition to the nra came to a head in 1935, when the conservative supreme court declared the agency unconstitutional, claiming the nra gave the executive branch regulatory powers that belonged exclusively to congress. this decision began a series of court decisions that overturned key elements of the new deal.