"Metamorphosis - space and culture. The issues of physical and cultural change bring into discussion a question which has been fundamental for the Architectural theory during the last three centuries: that of the connection between spatial form and culture. It is by observing changes in space and culture that the effect of the one onto the other is sought, claimed or denied. A historic account of the ideas concerning the relation between space and society is beyond the interests of this report which limits itself in those ideas which conceive physical environment as the product of the society and vice versa (Functionalism or Modernism), or as only representational of social functions, or even autonomous and self-referential (PostModernism). The understanding of the bonds between society and space, life-style and architecture, cannot be based on either one taken separately. Architecture apart from belonging to the visual Arts and representing culture through an econographic system of visual form, forms also a constituent of society through the organization of space and, at the end, constitutes a "metalanguage" embodying as contents formulations of previous contents. The research carried out for the city of Kalamata is presented as an example to illustrate this role of Architecture. The constitutive aspects of space-the spatial and social analysis of the city of Kalamata. The property of Architecture to organise artistic expression is undeniable. However, it is argued that what is interesting is not only the meaning that is represented by the Architectural form but also the meaning of the spatial morphological properties themselves, the underlying spatial patterns which have already embedded social patterns and vice versa. The social relations of differentiation for example can only be preserved of social categories are spatially separated. The urban morphology. In a part of the research which was carried out for the city of Kalamata the global morphological properties of urban space, the properties of individual houses in relation to the urban context as well as in themselves were analysed. The research used also the historical data recognising that a pure morphological analysis could not ever on its own fully explain the properties which were described. Analysis of the urban space identified two distinct patterns of spatial morphology which coexist side by side. The first pattern is defined by a core consisting of long and densely located lines streching out from the North to the South. The second one is defined by a core which consists of lines that are not clustered but equally distributed throughout the area. The phenomenon of the two different typologies of urban layout was explained through historical information which revealed that the Neo Classical plan of the 1905 and the changes which followed attempted to disconnect the area which is characterised by the second pattern form the rest of the city as it is today."