Italy, with INFN, and the Netherlands, with Nikhef, are leading the project.
ET, the Einstein Telescope, the project for the largest and most sensitive gravitational wave telescope ever built, has been included in the list of major research infrastructures on which Europe has decided to focus in the near future. ESFRI, the European Strategy Forum on Research Infrastructures, has approved the project and included it in the 2021 update of its roadmap. The decision, which is eagerly awaited by the international gravitational waves scientific community, was taken by the ESFRI Assembly, attended by delegates from the ministries of the various countries, following a long and thorough evaluation process. ET's candidature for ESFRI was submitted by the Italian MUR Ministry of University and Research on behalf of the international ET collaboration. Italy, in fact, by virtue of its long and internationally appreciated scientific and technological tradition in the direct detection of gravitational waves, is leading the project with the INFN National Institute of Nuclear Physics, together with the Netherlands with its counterpart institute Nikhef. For Italy, the INAF National Institute of Astrophysics, the INGV National Institute of Geophysics and Volcanology, and the Universities of Cagliari and Sassari are also participating in ET.