The Research Training Group "Critical Infrastructures: Construction, Functional Crises and Protection in Cities" (KRITIS, RTG 2222) at the Technische Universität Darmstadt started its research activities on October 1, 2016 and has just been extended in the second round until 2026. Historians, infrastructure and land use planners, civil engineers, philosophers, political scientists, architects and IT specialists work together in the research group, which is funded by the German Research Foundation (DFG). As one of its central policy fields, KRITIS examines infrastructures in the energy sector.