  Ursa Minor (UMi) is one of the closest satellites of the Milky Way (d=69
kpc). It is possibly a disrupted dSph interacting with the external Galactic
halo. This makes its study quite necessary in the forementioned context. In
this paper we present preliminary results of a wide field photometry survey of
UMi and discuss the presence of an intermediate-age population and tidal tails
in it.
