This lecture explores the concept of territory, from the relationship between city, landscape, and architecture to the evolution of suburbanization as a global phenomenon. It delves into the construction of territory through examples like a trip from Paris to Saint-Cloud, the development of sewers, and the creation of canals and aqueducts. The lecture also discusses the transformation of natural landscapes into cultivated fields and farms, as well as the infrastructure needed to connect places for product exchange. Through quotes from Melvin Webber, Alberto Moravia, and André Corboz, the lecture reflects on the human intervention in shaping the environment and the significance of understanding the historical traces and mutations of a territory.