Book excerpt: The relationship between public and private spheres is one of the key concerns of the modern society. This book investigates this relationship, especially as manifested in the urban space with its social and psychological significance. Through theoretical and historical examination, it explores how and why the space of human socities is subdivided into public and private sections. It starts with the private, interior space of the mind and moves step by step, through the body, home, neighborhood and the city, outwards to the most public, impersonal spaces, exploring the nature of each realm and their complex, interdependent realtionships. A stimulating and thought provoking book for any architect, architectural historian, urban planner or designer.