The city has had a rich and tumultuous history, evolving from a powerful political entity in ancient times to its modern role as a local hub of tourism and commerce. Sovereign City examines the nature of the city's ever-changing status, as Geoffrey Parker investigates the city-state as a geopolitical form and explores its distinctive niche within different types of states. This probing work analyzes the various forms of city-states throughout world history, from the Greek polis, which Plato and Aristotle considered the perfect type of state, to the Roman imperial capital, to the political role