The first of a two-part series on Adolf Loos, “Residences” is the theme of this issue. Divided into four chronological chapters, it gives an understanding of the different techniques the architect used over the years in approaching each project’s site. From early urban residences and villas in natural surroundings, to the mature ‘Raumplan’ concept, Loos’s pursuit of economic efficiency and rationality is examined through his architectural spaces. Each project includes the relations and collaborators he worked with, as well as clear labelling on all drawings, in order to provide a basis for reference material. The issue is guest edited by Yoshio Sakurai, Tokyo University professor and an expert on Loos.