 ESO's telescopes and instruments have contributed to essentially all parts of astronomy and astrophysics. And as a result there are discoveries in quite a number of subfields of astronomy. ESO's website keeps a list of the top 10 discoveries and I think all of them are fantastic. And it is not so easy to decide which of these is the most important. Amongst my personal favourites are certainly the fascinating studies of the surroundings of the Galactic Centre black hole with the stars running around it, testing general relativity basically. There are discoveries about a deep universe. ESO's telescopes image the first exoplanet making a big contribution in that field. And the HAARP spectrograph has continued to find very interesting planetary systems around other stars. 50 years into ESO's development we are still operating telescopes on Lesia, in fact using the HAARP's instruments.