Erling Viksjø's buildings challenge our notions about what constitutes good architecture. His extensive use of concrete, modules and repetitive shapes has caused many to describe him as Norway's foremost Brutalist architect. Viksjø also went furthest in collaborating with visual artists. Concrete in Transition examines the encounter between art and architecture in Viksjø's projects. How could one attain a unified design where art was no longer an addition to, or in competition with, the architecture? This publication discusses Viksjø's collaborations with well-established artists such as Hannah Ryggen and Kai Fjell, and young Modernists including Odd Tandberg, Carl Nesjar and Inger Sitter. In addition, it discusses the projects in which he collaborated with Pablo Picasso.Text in English and Norwegian.