Cepheid distances based on Gaia and VMC@VISTA observations
  We present new accurate Period-Luminosity (PL) and Period-Wesenheit (PW)
relations in the V,J,Ks bands based on a sample of more than 4500 Cepheids in
the Large Magellanic Cloud (LMC) whose photometry was obtained in the context
of the VISTA Magellanic Clouds (VMC) Survey. The excellent precision of these
data allows us to study the geometry of the LMC and to establish a solid
baseline for extra-galactic distance scale studies. To calibrate the zero
points of these PL/PW relations, we adopted Gaia Data Release 2 parallaxes for
more than 2000 Milky Way Cepheids. The implications for the measurement of
$H_0$ are briefly discussed.
