Architecture is the product of a combination of parties, of a process in which architects respond to their clients. Yet despite the attention paid to a few famed clients, like Truus Schröder, architecture is often examined and explained on the basis of the considerations of the architect, embodied in the object, and the ideas developed within the design discipline. This issue of OASE looks at the influence of the client on the way buildings or urban ensembles take shape. This is a historiographic revision: clients often prove to have creative impulses of their own, and their social views have had an impact on the evolution of architectonic cultures. The issue also includes conversations with clients who explicitly view their work as a contribution to the culture of building and the sustainable development of urban societies. In an era in which both clients and architects are compelled to reflect on their role and responsibility, a re-reading of architecture history from the perspective of the commission is more than necessary.