Transparent glass facades dominate much contemporary high-to mid-rise urban residential architecture. This article takes a closer look at life behind glass facades in contemporary surveillance culture. The aim is to illuminate how the material culture of contemporary architecture together with surveillance practices and technologies contribute to a remodelling our notions of the visible and the invisible. Whereas the architecture is determined by conditions and possibilities of what it means to be living behind glass facades, the novel Die 120 Tage von Berlin by the German author Lukas Hammerstein explores the complexities that this mode of living cause on a socio-psychological level. Through this dual track analytical strategy a complex set of connotations governing our understanding of visibility and invisibility will be uncovered.Imagine yourself in any larger European city. You are in the touristic centre with quaint old buildings, shops and cafes on street level, the odd museum tucked into the dense urban fabric. You gradually move away from the throngs of tourists and shoppers and reach, often without having to walk all that far, one of the city's most recently developed districts, an area filled with new buildings, typically a mix of high-end dwellings and offices. These areas are, more often than not, built on sites that have been left over from the industrial period. They leave you with a very uniform impression caused by the predominance of one architectural aesthetic: tall, potent, freestanding buildings and an almost omnipresent use of glass and steel.One of the main characteristics of this architecture is the tendency towards extensive openings into the interior spaces through large windows or even glass facades. It is an aesthetic which makes one think of the modernist architecture of the early twentieth century. It does so by simultaneously drawing on two apparently contradictory aesthetic expressions. On the one hand, the buildings evoke the utopian glass architecture which can be found in the drawings of the expressionists and in modernist icons by architects such as Mies van der Rohe. It is an architecture which is elitist and radical and has mainly been realised in office buildings in high-rise areas. On the other hand, they call on the general modernist reform credo of air, light and sun for a new residential architecture in direct opposition to the dense block structure of the traditional urban core. During the last two decades, this double aesthetic paradigm has become more and