A new volume dedicated to the constructed works of Adolf Loos represents an important and significant challenge, largely because it draws from a vast body of literature throughout the decades of the 20th century. To consider Loos today, to examine his complex planning process, to walk among the spaces imagined and designed by him, means most importantly to bring back to life, with the fresh perspective of an inquisitive contemporaneity free from ideological filters, the work of one of the most significant architects of the last century, redelivering it to the present and making it possible to gain new resources from it. The work of excavation, analysis and redrawing of the Viennese master’s oeuvre, realized by Ralf Bock and together with the previously unpublished and surprising photographic documentation by Philippe Ruault, bring to us a new architect, capable of imagining spaces and constructions that are surprisingly rich and dense.