  We present wide field multiband photometry of the very low surface brightness
dwarf Spheroidal galaxy (dSph) Sextans. We have found convincing evidence for
the presence of multiple stellar populations in this galaxy. In particular we
discovered: (a) a Blue Horizontal Branch tail kinked over the instability
strip; (b) a clearly bimodal distribution in color of the Red Giant Branch
(RGB) stars and (c) a double RGB-bump. All these features suggest that (at
least) two components are present in the old stellar population that dominates
the galaxy: a main one with [Fe/H]~-1.8 and a minor component around
[Fe/H]~-2.5. Similar evidence has been recently found by Majewski et al. (1999)
for the Sculptor dwarf Spheroidal, suggesting that multiple star formation
episodes are common also in the most nearby dSphs that ceased their star
formation activity at very early epochs.
