The 10th ET symposium is organised in Orosei, Sardinia, close to the Sos Enattos site, one of the candidates to host the ET infrastructure. The date are 11th-12th of April, 2019, and the meeting will focus on the organisation of the ET collaboration, on the ET ESFRI proposal, on the science and technology for the 3rd generation of GW Observatories. The web site of the event is: