What is the most powerful polis?

Could you elaborate on the term "polis" in the context of your question? However, if we're referring to political entities in ancient Greece or a similar context, then the query could be directed towards evaluating the strength of various city-states. In such a case, one might inquire: "Which polis exhibited the greatest prowess in its heyday, considering factors such as military might, economic prosperity, cultural influence, and political stability? Was it Sparta, renowned for its warrior culture and disciplined society? Or Athens, known for its intellectual prowess, democratic system, and contributions to philosophy, art, and science? Perhaps another polis entirely held sway during its time?