The phenomenon of migration and the process of migrant inclusion into the host society is a very up-to-date topic in political and social debate in both scientific and public community. Despite the importance of the topic, theory of architecture and spatial planning has not made any contribution to this issue yet. Therefore, the objective of the dissertation in its theoretical part, is to clarify consequences of migration in the process of home constitution and its consequences in formation of a physical bond to the new place. Dissertation describes numerous forms and versions newly constituted architecture may adopt in line with various needs of the target groups involved. This work also addresses the important mission of migration policies, which directly influence the image of spatial ethnic concentrations in Slovakia and worldwide, throughout centuries. The analysis of international migration and its threats has approved that the question of urban structures, their identity and the identity of oneself in the process of reterritorialisation is much more alarm than the question of ethnicity, or group identity - standing in spot light till lately. Practical part of the dissertation targets the possible ways of eliminating the negative effects in urban grain which were brought about by migration. Research part also addresses the preservation of urban diversity and its architecture, which is considered to be the product of natural individuality of each citizen. The results of dissertation research part bring along the concept and the basic criteria of a regulating instrument, named The Scenarios of Subculture Development, which are intended to be used in the field of architecture and design. The purpose of the Scenarios from a long-term perspective is to transform the identity of architecture and urban grain into diverse thematic districts, so that each (of them) would correspond with differentiated needs and preferences of its inhabitants. The Scenarios have been basically evolved from and are intended to continue in line with the results of a EU grant project The Ecocity and the project of Historical Urban Structure Preservation in the Central Urban District of Bratislava. Thus, an important part of the dissertation is the ecological dimension, sustainability and the cultural continuity.