My thesis is a system of Urban Renewal by combining work, housing and community facilities in deteriorated central sectors of Latin American cities. The arguments which uphold this position are: The immediate necessity of revitalizing deteriorated sections of cities which have grown without proper attention. -- The urgency of construction on a large scale, especially dwellings, to cover the existing deficits of housing and demographic growth. -- The need for realizing the tvork of urban renewal through the govern-ment in each of the different Latin American countries. -- The necessity of increasing Industrialization and the economic development in each of the Latin American countries. -- The change which should be realized in the traditional form of city planning in the concept of integration of the basic dwelling, work recreation and circulation of wrban planning and the concept of integration rather than their separation. -- The application of the concept of "evolution" In architecture and urban planning, that is to say taking into consideration the process of the life cycle, growth, development, and renewal of the parts.