In the very first episode of ‘Onder Planologen’ we discuss a phenomenon of the 19th century: revolutiebouw (jerry-building). Buiten WIttenvrouwen, Oude Westen and the Kinkerbuurt: currently these neighbourhoods are all hotspots of the urban housing market. At the end of the 19th century, like now, there was pressure on the housing market and in this periode these neighbourhoods were built. Dwellings were small and materials were cheap.