The process of coding is a systematic experimentation with signs, symbols, and the construction of larger cultural meanings. The fourth volume in the series Kontext Architektur examines the architectural-historical and -theoretical relevance of the concept of " code" from various perspectives. The authors and editors start from the premise that this concept makes for new ways of translating architecture into language. Thus, the dominance of computer simulation makes it clear that the building is no longer merely a vehicle for signs, but literally also their product. The code has penetrated, as it were, from the exterior of the building into its interior, into its structure. We are dealing with both a socio-cultural as well as with a mathematical and formal notion of code. The goal of this book is thus to arrive at a critical grasp of the contours of this vibrant conceptual tension between the cultural and the formal, the " outside" and the " inside," while also formulating questions for further exploration that are relevant for architecture.