The enthusiasm for the expressionist metropolis, characterized by its complexity, verticality, and theatrical architecture, also captured the urban landscape of the Rhine-Ruhr region in the 1920s. Even today, existing expressionist fragments—not only of the industrial heritage—testify to an unwavering commitment to form and a skilled handling of color, material, and light. The volume documents 155 buildings through contemporary photographs and plans, including those in Bochum, Bottrop, Dortmund, Duisburg, Düsseldorf, Essen, Gelsenkirchen, Hagen, Cologne, Münster, and Oberhausen. A detailed index and clear maps complete this reference work.