Scale models are invaluable to the architect when checking designs and establishing forms, but they also enhance the communication. between the architect and those involved in the planning and construction stages. A three-dimensional model speaks a language which can be instantly understood and enables spatial relations to be perceived at a single glance. This work presents more than 200 scale models of notable 20th-century houses by architects including Aalto, Asplund, Le Corbusier and Wright. The models show arrrangements of rooms and light conditions aimed to help the reader to develop and train their ability to visualise spatial concepts.