The purpose of the paper is to point out the characteristic features of spatial development in cities of the Metropolitan Union of Silesia (GZM), located in the central subregion of the Upper Silesian region. The specificity of its development is the result of both historical conditions arising from the exploitation of natural resources, which were taking place for many centuries, as well as the contemporary economic and social impacts that are affecting the functioning of highly integrated territorial units that co-create the GZM. The presented research results refer to a selected area of interest in urban morphology. In this case, it is the comparison of a combination of building types located in the GZM cities with buildings in other cities of the Upper Silesian region and all other Polish cities.