Question

Is this correct? A city-state is an empire.

Answer 1

"A city-state is a sovereign state that consists of a city and its dependent territories. Historically, this included cities such as Rome, Athens, Carthage,[1] and the Italian city-states during the Renaissance—but today only a handful of sovereign city-states exist, with some disagreement as to which are city-states. A great deal of consensus exists that the term properly applies to Singapore, Monaco, and Vatican City."

Hope this helps!