TECHISCHE UNIVERSITAT WIEN | Studio Leader : Mladen Jadric The project is a parallel intervention in two cities, a creative refurbishment of the typical “Dormitory Town”- one housing project built in Handelskai, Vienna and the second one in Jamsil, Seoul. The main goal is to design tools helping us to overcome a social and physical phenomenon of "boundaries" in urban society. Proposed solutions are named “social prostheses” ？ they are physical additions installed in four strategic areas: roof-landscapes, facade, interiors and spaces “in between”. Their goal is to improve the quality of living and to enable and/or intensify physical and social interaction among the tenants. An analysis of the contemporary situation in Vienna and Seoul includes documenting social and general community boundaries. This experience was a crucial for understanding the need for a collective city. The Book of Boundaries explores the problem of social- and physical cocooning, the phenomena of limits and exclusivity in urban society, and offers solutions as to how to overcome this process. Intercultural dialog within the relevant frameworks explores these familiar phenomena within a non-familiar cultural and social context to facilitate a mutual learning experience and help create sustainable social communities.