[Date changed due to UCU strike]
Einstein Telescope (ET) is the pioneer project aiming to the realisation of a 3rd generation Gravitational Wave Observatory in Europe. Benefiting of the momentum given by the scientific successes of the LIGO and Virgo detectors, the ET project had, in the last few years, an important boost toward its realization. ET will be a new discovery and a precision measurement observatory; it has a rich variety of scientific and multidisciplinary targets in astrophysics, nuclear physics, fundamental physics and cosmology. ET is also a technological challenge: to achieve the expected sensitivity, a new underground research infrastructure will be realised, a multi-interferometer per detector design will be implemented hosting new or updated technologies studied to reduce the noises limiting the current detectors. An overview of the science targets, of the observatory design, of the needed technologies and of the ET project organisation will be discussed.