CIT-IES is a long-term project about divided cities in Europe. It explores the logic of violent urban partition along ethnic/religious/political lines focusing especially on urban, architectonical and human costs of these division (present or past). It wants to offer a warning beacon to a growing class of cities torn apart by ethnic or ideological rivals. I wanted to illuminate the history of urban dividing lines, the social impacts of physical partition and the assorted professional responses to „self-imposed apartheid.“