This dissertation is a conclusion to my longstanding interest in architectural fantasies, focusing on their chronological transition, from framed and static pictorial representations to functional, life-hosting virtual environments. In the first part, an effort to define architectural fantasies is taking place, based on J. R. R. Tolkien’s thoughts about fantasy, combined with the characteristics shaping them, their relationship with the real world, as well as the concepts that explain their purpose. The two following parts consist of examples of representations through the mediums of drawing, film and virtual reality, including three personal experimentations, realized during my current and my former architecture studies. Overall, this dissertation aims to prepare the field for an architectural design process essentially new, based on a scenario, new laws of physics and the technology of mixed reality.