The E-ELT showing the secondary mirror housing

This artist’s rendering of the European Extremely Large Telescope (E-ELT) is based on the detailed construction design for the telescope. The huge secondary mirror housing is clearly visible at the centre of this image, sitting at the top of the telescope structure, high above the enormous 39-metre primary mirror. On 25 May 2016, ESO signed a contract with the ACe Consortium, consisting of Astaldi, Cimolai and the nominated sub-contractor EIE Group to build the dome and telescope structure of the E-ELT.