The relationship between the industry and a town, or specifically the production and housing has gone through dramatic development during the past two centuries. Various tendencies became apparent in the theory and in the urbanistic practice. The integration of functions was apparent in a pre-industrial town at the beginning; this resulted in serious problems and a “collapse” of a traditional town as the industry grew dynamically during the “Gründerzeit“. In response, towns were criticized and effort was made to fully segregate functions. In the second half of the 20th century the schematic application of mono-functional areas was justifiably criticized and “reason-able” integration was required again after the transfer to polyfunctional units and complex solutions to towns.