The H.E.S.S. Extragalactic Sky
  More than fifty extragalactic very high energy (VHE; E>100 GeV) sources have
been found using ground-based imaging atmospheric Cherenkov telescopes, about
twenty of which have been discovered using the H.E.S.S. (High Energy
Stereoscopic System) experiment based in Namibia. Even though BL Lac objects
are the dominant class of VHE detected extragalactic objects, other types of
sources (starburst galaxies, radio galaxies or flat spectrum radio quasars)
begin to emerge. A review of the extragalactic sources studied with H.E.S.S. is
given, with an emphasis on new results.
