ESO has been one of the founding fathers of the Virtual Observatory (VO),starting from 2000 when ESO and the Space Telescope European Coordinating Facility (ST-ECF) hosted the first EC-funded (Fifth Framework Programme, FP5) demonstration programme ASTROVIRTEL (2000-2003), and supporting, since, all European-wide and world-wide VO initiatives: the Astrophysical Virtual Observatory (AVO, 2002-2004), the Euro-VO (2004-present), and the International Virtual Observatory Alliance (IVOA, 2002-present).
ESO has tasked the Virtual Observatory Project Office (VOP) to implement the Virtual Observatory concept:
