is a sovereign state that consists of a city and its dependent territories. Historically, this included famous cities like Rome, Athens, Carthage, 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. However, a great deal of consensus exists that the term properly applies to Singapore
, and Vatican City
(although the last of these consists only of part
of a city). In particular, Singapore has been referred to by The Economist
as the "world's only fully-functioning city-state".