  We report the discovery of broad MgII emission from the high redshift radio
galaxy 3C265 (z=0.81). We detect the broad line in the nuclear spectrum and in
the spatially extended galaxian component, both near the nucleus and in the
spectrum of an off-nuclear knot located 31 kpc south east of the nucleus of the
galaxy. These data provide strong support for the simplest form of the
unification hypothesis, that radio galaxies are quasars whose optical radiation
is directed in the plane of the sky rather than into our line of sight. These
data also strongly support the scattering model for the alignment of the UV
continuum emission with the radio axis. In 3C265, if the axis of the
anisotropically emitted UV continuum radiation is identified with the major
axis of the radio source, then the observed rest frame UV continuum emission
implies that the opening angle of the radiation cone is large (half angle
approximately 45 degrees). We also derive a mass estimate of 8x10^{10} Msun for
the central region of 3C265 from its rotation curve. The implied mass-to-light
ratio is low (M/L is roughly 2), and suggests that a significant fraction of
the rest frame UV continuum emission from this galaxy is dominated by
reprocessed radiation from the buried AGN. Finally, we detect the
CaII\lambda3933 K line in absorption in the integrated spectrum of 3C265. This
provides direct spectroscopic evidence for the existence of stars in a high
redshift radio galaxy.
