Stadtstaaten are city-states, which are independent or semi-independent cities that also serve as their own sovereign states. They typically have their own governments and laws, allowing them to operate independently from larger nations. Examples of Stadtstaaten include Singapore, Monaco, and Vatican City. These city-states often have unique economic and political systems due to their small size and population. They can be centers of trade, finance, and culture, attracting people and businesses from around the world. The concentration of resources and infrastructure in a small area can lead to efficient governance and vibrant urban life.