The identity of a city is not only a physical phenomenon but it is also attached to the social practice of its users. It fluctuates over time, as the urban environment grows or shrinks and lifestyles change. The symbolic meaning of both social practice and buildings and spaces is stored in the collective memory of its inhabitants. Even when the built environment completely disappears, the urban identity that was attached to it will not. Its inhabitants remain and will preserve and reinterpret the identity of their lost city in their way of life, their habits and their memories.