  For Seyfert galaxies, the AGN unification model provides a simple and well
established explanation of the Type 1/Type 2 dichotomy through orientation
based effects. The generalization of this unification model to the higher
luminosity AGNs that are the quasars remains a key question. The recent
detection of Type 2 Radio-Quiet quasars seems to support such an extension. We
propose to further test this scenario.
  On the basis of a compilation of quasar host galaxy position angles
consisting of previously published data and of new measurements performed using
HST Archive images, we investigate the possible existence of a correlation
between the linear polarization position angle and the host galaxy/extended
emission position angle of quasars.
  We find that the orientation of the rest-frame UV/blue extended emission is
correlated to the direction of the quasar polarization. For Type 1 quasars, the
polarization is aligned with the extended UV/blue emission while these two
quantities are perpendicular in Type 2 objects. This result is independent of
the quasar radio-loudness. We interpret this (anti-)alignment effect in terms
of scattering in a two-component polar+equatorial model which applies to both
Type 1 and Type 2 objects. Moreover the orientation of the polarization -and
then of the UV/blue scattered light- does not appear correlated to the major
axis of the stellar component of the host galaxy measured from near-IR images.
