  Phase diagram of strongly interacting matter is discussed within the exactly
solvable statistical model of the quark-gluon bags. The model predicts two
phases of matter: the hadron gas at a low temperature T and baryonic chemical
potential muB, and the quark-gluon gas at a high T and/or muB. The nature of
the phase transition depends on a form of the bag mass-volume spectrum (its
pre-exponential factor), which is expected to change with the muB/T ratio. It
is therefore likely that the line of the 1st} order transition at a high muB/T
ratio is followed by the line of the 2nd order phase transition at an
intermediate muB/T, and then by the lines of "higher order transitions" at a
low muB/T.
