CCRI CoPs' goal is to strengthen and complement the CCRI, in order to foster the implementation of Circular Systemic Solutions (CSS) in European cities and regions. Based on an initial scoping and needs assessment, the project will set up at least eight Communities of Practice – working groups of ambitious European cities and regions collaborating on key topics related to circular economy implementation. The project will also deepen the CCRI knowledge on circular economy, with the production of highly impactful case studies on CSS, a series of white papers on key Research & Innovation (R&I) gaps, guidance documents for practitioners at the local and regional level, as well as recommendations for EU and national policy makers, to unlock barriers faced local and regional authorities. By establishing a series of mechanisms such as capacity building sessions, study visits and a twinning program, the project will stimulate knowledge transfer, pear learning and capacity building towards an audience of cities and regions, including but not limited to CCRI Pilots and Fellows. The consortium will also provide continued support to the CCRI’s Thematic Working Groups (TWGs). All dissemination and communication activities will use the CCRI existing umbrella identity and existing communication channels. The project will endeavour to strengthen links with the European ecosystem and to promote the circular economy towards all European cities and regions. Those activities will be done in close coordination with the CCRI-CSO and DG RTD, to take advantage of potential synergies and importantly to prevent any overlaps and duplications with the work of the CSO. Led by ICLEI Europe, the project brings together 11 leading organisations active throughout Europe and with considerable expertise and experience in supporting cities and regions’ sustainability transition.