CapaCITIES will shape a European environment conducive to urban climate neutrality transitions for national, regional and local authorities. The project aims to initiate and strengthen national change processes by establishing national networks and governance structures and by providing dedicated support for public authorities to put enabling conditions and measures for cities in place for achieving the cities mission. To achieve this ambition, the CapaCITIES consortium represents 15 European countries who have committed to initiative and strengthen national change processes by ministerial or other high political level. CapaCITIES thereby build on a well-established network of national authorities (national ministries and agencies responsible for urban transition) with its relevant urban stakeholder organisations beyond the consortium partners and countries. To all project partners CapaCITIES offers dedicated services to in support of national change process. First, a transnational alliance for public authorities to exchange, learn and inspire each other in their transition towards climate neutral cities. Second, support in prototyping innovative multi-level and cross sector governance structures. Third, thematic capacity building for public authorities and support in taking effective local action and fourth, strategic synergies and access to other initiatives that address the climate neutral and smart cities mission.