Description:The book explores the intersections between the material artifact ‘wall’ and its strategic and tactical relevance in the contemporary city. It deals with urban spatiality, public places, trajectories, and territoriality; visibility, urban surfaces, and urban visual landscape; materiality and immateriality; governmental and corporate strategies in the use of walls; writings in public space, graffiti, murals, street art, public art, outdoor advertisement, logos; use of space, right to the city, social practices, social actors, resistance, subcultures.