Digitalization has transformed the discourse of architecture: that discourse is now defined by a wealth of new terms and concepts that previously either had no meaning, or had different meanings, in the context of architectural theory and design. Its concepts and strategies are increasingly shaped by influences emerging at the intersection with scientific and cultural notions from modern information technology. The new series Context Architecture seeks to take a critical selection of concepts that play a vital role in the current discourse and put them up for discussion.In the context of discussions of the medial, the notion of simulation plays a central role in architecture as illusion and imitation. In dialogue with information technology and computer science, however, that notion has now taken on a new quality in architectural discourse. Today when we speak of simulation we primarily think of computer simulation, the technical ability to simulate processes.Whereas simulation used to refer to a mode of presentation, it now connects architecture with the sciences and represents a strategic and methodological instrument, a tool of discovery. With the scientific principle of simulation the focus shifts to the idea of modeling a dynamic system (Norbert Wiener), not just presenting finished products but going in search of solutions and developing systems!