The European SOLAR Research Infrastructure for Concentrated Solar Power (EU-SOLARIS) is a distributed Research Infrastructures that aims to achieve a real coordination of Research and Technology Development (RTD) capabilities and efforts in Concentrating Solar Power/Solar Thermal Energy (CSP/STE) technologies by the European Research Centres. EU-SOLARIS will become the reference for CSP/STE and maintain Europe at the forefront of these technologies by providing the most complete, high quality scientific portfolio and facilitating the access of researchers to highly specialised facilities via a single access point. EU-SOLARIS will link scientific communities and industry and speed up the development of research and innovation due to a closer collaboration model, knowledge exchange management and a wider dissemination of results. It will increase the efficiency of the economic and human resources required to achieve excellence and provide efficient resources management to complement research and avoid redundancies. EU-SOLARIS was included in the ESFRI Roadmap 2010 and started the Implementation Phase in 2018 with expected start of operations in 2020.