Abstract
Cities in the present time are developing in a very vivid and dynamic way. At the same time, in Polish reality, many cities are physically losing the characteristics of buildings that defined the urban space for centuries. It seems that some cases of Polish cities are heading towards „formlessness”, and their structure instead of being crystallized is deformed and destroyed. The problem of the loss of the cities’ urban form was named by the author as the deformation of the city. The article presents social, cultural and legislative phenomena which cause negative processes, also points out the chances and possibilities of real prevention of urban structure’s break up.