• When and why did planning begin, and what problems was it meant to solve?
• Who developed the projects, and how, and who made the decisions?
• What urban ideas are expressed in the projects?
• What were the legal consequences of the plans, and how did they actually affect
subsequent urban development in the individual cities?
• What similarities or differences can be identified between the various schemes?
• How do these projects compare with earlier planning, and how did they affect the
subsequent development of urban planning in general?