The history of architecture is a history of completed buildings and ended narratives. In a circular construction economy, however, the end of a building is also the beginning of a new story. Due to analysis of exemplary demolitions, this research examines the life after of prominent structures, the history of their dissolution, final storage and concepts for the re-use and further use of construction waste, building materials and components. The focus of the work is not quantitative studies of material flows, but the social, cultural, and affirmative architectural handling of the remains of the architecture in the 20th century.