The reports were written by 16 field researchers as the result of the field research conducted in the second half of 2013 in 40 cities in 14 countries across Europe. They explore what institutions are required to ensure a local transition towards sustainability. They synthesise all relevant information for each city, enriching and contextualising the data collected via questionnaires and face-to-face semi-directed interviews as well as additional desktop research. Thus, they constitute a relevant component for data analysis and interpretation and for answering the research questions of the research project "ROCSET – The Role of Cities in the European Socio-Ecological Transition", which is part of the larger WWWforEurope project.