In Ancient Near East what was the concept of the city-State an important innovation and development of Art?

The concept of the city-state was an important innovation and development (and invention) of Art because these cities, such as Uruk or Lagash, are some of the earliest known complex urban centers, and the settlement of people in them made necessary the construction of walls, temples, and burial sites that today are recognized as archeological vestiges of exceptional significance.

Furthermore, since the people that had settled in them had at their disposal food resources and an administrative class that took care of their needs and secured their welfare, artistic and craft production flourished in them.