Report in English on the results of the international Stadslab Master Class on urban segregation. The project focuses on the redevelopment strategy for the Lyuko valley in the Hungarian city of Miskolc. The valley is occupied by an increasing number of roma residents, who live in ramshackle buildings and very poor conditions. The international team develop design strategies for a long term re-integration strategy for the roma population. The report contains essays by international experts on segregation, integration policies, gypsy architecture and urban anthropology. The design strategy itself is extensively illustrated.