Gaia Benchmark stars and their twins in the Gaia-ESO Survey
  The Gaia benchmark stars are stars with very precise stellar parameters that
cover a wide range in the HR diagram at various metallicities. They are meant
to be good representative of typical FGK stars in the Milky Way. Currently,
they are used by several spectroscopic surveys to validate and calibrate the
methods that analyse the data. I review our recent activities done for these
stars. Additionally, by applying our new method to find stellar twins on the
Gaia-ESO Survey, I discuss how good representatives of Milky Way stars the
benchmark stars are and how they distribute in space.
