  We discuss the production and two-photon decay of the lightest Higgs boson
(h) of the minimal supersymmetric standard model at the CERN Large Hadron
Collider. Since the observability of the signal is quite model dependent, we
conduct a thorough scan of the parameter space of minimal supersymmetry,
including experimental and theoretical constraints. If kinematically allowed,
supersymmetric decay modes of h may be important, and can even dominate all
others. The coupling of h to $b\overline b$ can be different from that of a
standard model Higgs boson; this can diminish (or enhance, but only if
tan$\beta$ is very large) the h -> $\gamma\gamma$ signal. We emphasize the
importance of a full treatment of radiative corrections in the Higgs sector for
obtaining the h $b\overline b$ coupling. If supersymmetric particles are not
too heavy, their contributions in loops can either enhance or suppress both the
production cross-section and the h -> $\gamma\gamma$ branching fraction. We
discuss the relative importance of these factors in the context of various
scenarios for the discovery of supersymmetry. Even if h is not detected at the
LHC, h may still exist in its expected mass region.
