  The role of Supernova Remnants (SNRs) for the production of the Galactic
Cosmic Rays is reviewed from the point of view of theory and very high energy
gamma-ray experiments. The point is made that theory can describe young SNRs
very well, if the evidence from the synchrotron emission is used to empirically
determine several parameters of the theory, and thus theory can predict the
relative contributions of hadronic and leptonic gamma rays at TeV energies.
This is exemplified for several objects that have been observed intensively
during the last years. Future key observations are discussed.
