We first discuss the future role of the CITY as a main generator of cultural fiction and suggest a superimposition of the PHYSICAL city and the DIGITAL city. We then draw parallels between the original intentions behind the World Wide Web and Hyper Text Markup Language and its expected follow up CYBERSPACE and Virtual Reality Markup Language. The development of three-dimensional SEMANTIC CODES for interactive environments is identified as one main task of the future. Within this framework, Babylon S M L XL, a series of research experiments conducted at the Architectural Space Laboratory at the professorship is investigating concepts and methods. The images display some scenes from this work in chronological order, while the captions provide content descriptions and META CODE abstractions.