What do urban open spaces have to do with commercial and residential space? All these spaces can be understood as commons in the sense of the city as a community. They form different types of spaces of the commons when they are inclusively and collectively appropriated and then function beyond the attributions of public and private. These spatial resources of the city, as well as the rules, conventions and social relations that organise living together in these spaces, are based on a notion of property that is oriented towards common use and not profit. Dagmar Pelger explores the multi-layered and also contradictory potential of the concept of the commons. Through cartographic inventories of concrete places in Berlin, spatial phenomena and attributions of this communalisation become visible. The interdisciplinary mappings provide information about types, processes and rules of spatial commons and thus also show ways of shaping the city as a spatial commons.