How can the operation of cities with digitally networked infrastructures be ensured in extreme situations, crises and disasters? In 2050, two-thirds of the world‘s population are expected to live in cities. Their citizens are increasingly using digital infrastructures in all relevant areas: energy, transport, health and administration. This makes them dependent on these systems and, at the same time, renders them vulnerable to natural disasters, human or technical failure, crime, and terrorism. The LOEWE Center emergenCITY is working on solutions that increase the safety and security of digital cities, even in crises. The solution concept is interdisciplinary and includes modern information and communication technology as well as the historical, legal, social, and structural aspects of urban planning. emergenCITY wants to create robust infrastructures that guarantee support during and after a crisis, to enable a return to normality as quickly as possible.