The following images of Berlin have been prepared by Anna Rose and Christian Schwander at Space Syntax Limited as part of a wider study of the city. They show the pattern of “spatial integration” in Berlin at three key periods in history: 1940, 1989 and 2011. The colours read like a temperature scale, with highest levels of integration in red, orange then yellow, and lower levels of integration in green, blue then dark blue. Spatial integration measures the degree to which an urban street is connected into the overall street network. Connectedness is a key influence on the social, economic and environmental performance of urban places. The effects of the post-war division are clear, with the once integrated centre becoming disconnected until Reunification after 1989.