The Next Generation of Cherenkov Telescopes..

In the last decade, Very High Energy (E > 50 GeV) gamma-ray astrophysics has grown into a mature branch of astronomy having increased the number of discovered sources by about a factor of 10. These recent advances of TeV gamma -ray astronomy have shown that the 10 GeV-100 TeV energy band is crucial to investigate the physics prevailing in extreme conditions as well as to test fundamental physics. Nevertheless, with the recent launch of two gamma ray dedicated satellites (AGILE and Fermi), the gamma-ray astronomy is now opening unprecedented opportunities of multiwavelength observations on a very wide energy range. In such an exciting scenario, a new generation of ground-based VHE gamma-ray instruments are needed in order to significantly improve: the sensitivity, the operational bandwidth, the angular resolution and the field of view.