The Galactic Center region viewed by H.E.S.S
  The Galactic center region is the most active region in the Milky Way
harboring a wealth of photon sources at all wavelengths. H.E.S.S. observations
of the Galactic Center (GC) region revealed for the first time in very high
energy (VHE, E> 100 GeV) gamma-rays a detailed view of the innermost 100 pc of
the Milky Way and provided a valuable probe for the acceleration processes and
propagation of energetic particles near the GC. H.E.S.S. has taken more than
180 hours of good-quality observations toward the GC region since the
experience started in 2003. A strong and steady gamma-ray source has been
detected coincident in position with the supermassive black hole Sgr A*.
Besides the central pointlike source, a diffuse emission extended along the
Galactic Plane has been detected within about 1$^{\circ}$ around the GC. An
accurate analysis of the Galactic center region suggests that the diffuse
emission may dominate highest energy end of the overall GC source spectrum. I
will review the current VHE view by H.E.S.S. of the GC region and briefly
discuss the theoretical models which explain VHE gamma-ray emissions of the
central source and the diffuse emission.
