Modelling in the broadest possible sense refers to the conceptualization of a system using general rules and concepts. More particularly, modelling may refer to the production of mathematical models, physical models and 3D digital models. For mathematical models, we consider systems that allow interpretations of reality and that contribute to visualising new scenarios. For physical models we consider scale models (including full-scale models), that are representations of the actual object. For 3D models, we include virtual representations, by way of digital tools, of any three-dimensional objects. Although we may consider physical or virtual architectural modelling separately, we should be aware that they tend to converge via digital fabrication processes, which allow for easy production of full-scale models, as is the case of the fabrication of building components. In parallel, VR experiences allow the architect to sense the space as never before, giving him or her more means to preview and improve the design and, at a final stage, to invite users to participate in that experience in a simulation of reality. Modelling, nowadays, also allows designers to develop accurate solutions for structural and functional issues, which contribute to strengthening the comprehensiveness of the architectural design process. Researchers are invited to submit articles covering these fields, taking into account the role of all kinds of models in the conception, testing, definition and communication of architectural ideas and artifacts. Although we welcome papers covering different historical periods, we encourage a focus on contemporary practices where modelling – either conceptual, physical or virtual – is a key feature.