Christoph Brüll is Assistant Professor for Contemporary History at Luxembourg Centre for Contemporary and Digital History (C2DH). His research interests include the history of cross-border cooperation in Western Europe. He is the co-editor of Föderalisierung, Strukturwandel, Erwartungshorizonte [Federalisation, Structural Change, Expectations] (2023).Sebastian Haumann is Professor for Economic, Social, and Environmental History at Paris Lodron University Salzburg. His research interests include the history of raw materials and new methods in the field of Citizen Science. He is the co-editor of Concepts of Urban-Environmental History (2020).Stefan Krebs is Assistant Professor for Contemporary History at Luxembourg Centre for Contemporary and Digital History (C2DH). His research interests include the industrial history of Luxembourg and the history of repair and maintenance. He is the co-editor of The Persistence of Technology (2021) and Deindustrialisierung: Zum sozio-ökonomischen Wandel westeuropäischer Industriegesellschaften seit den 1970er Jahren [Deindustrialization: The Socio-economic Transformation of Western European Industrial Societies Since the 1970s] (forthcoming).Jens van de Maele is a postdoctoral member of the research group Modernity and Society (1800-2000) at KU Leuven. His research interests include architectural history and urban environmental history. He is the author of Architectures of Bureaucracy: The Politics of Government Office Buildings in Interwar Belgium (2025) and editor of Behind Office Doors: Use and Users in the History of Office Buildings (2026).