This publication is conceived as a major source to understand Wiel Arets’ architecture through the presentation of his principal writings, a selection of built work, projects, and other materials connected to his research and teaching. These materials are complemented with some of the most significant critical writings from the past ten years, plus a new text resulting from an exchange of writings between Arets and Xavier Co s t a . Special care is dedicated to the quality of photography and reproductions of architectural documents, as well as to the graphic treatment of the publication.