In the first decades of the 20th century, civil engineers were widely seen as a role model for future architects. Their role within the contemporary architecture movements, however, was hardly discussed. To this day, even fundamental questions about collaborations, rivalries, or conflicts between the two sister disciplines still await answers. This volume brings together contributions by international scholars on the cooperation between architects and civil engineers in various countries in the interwar period. By offering both insights into national peculiarities and new reflections on the general nature, character, and significance of such joint efforts, it opens exciting new perspectives on the modern building culture of Europe and beyond.