The Saturday issue of the prestigious German newspaper Frankfurter Allgemeine Zeitung published an obituary in which most of the Berlin rationalists, led by Hans Kollhoff, Max Dudler, Jan Kleihues, Paul Kahlfeldt, and several others, expressed their deep sorrow over the loss of their close friend Walter A. Nobel, who passed away at the age of just shy of sixty last Monday after a short but severe illness. Walter A. Nobel was a significant representative of architectural rationalism through his work and as a university professor, as well as a mediator between the German and Italian cultural scenes. In addition to studying architecture at the Technical University of Berlin, he was significantly influenced by his practice in the studios of Fehling+Gogel, O.M. Ungers, and V. Gregotti. Conversely, he drew academic experience from L. Snozzi, for whom he served as an assistant at EPFL Lausanne at the end of the 1990s. As a guest professor, he worked at ETH Zurich, as well as at the universities in Hanover and Bologna. Since 2009, he had been a professor and dean of the Faculty of Architecture at the technical university in Dortmund.