  Context. When low and intermediate-mass stars leave the Asymptotic Giant
Branch (AGB) phase, and before they reach the Planetary Nebulae stage, they
enter a very brief and rather puzzling stellar evolutionary stage named
post-AGB.
  Aims. To provide a reliable catalogue of galactic post-AGB stars together
with their physical and evolutionary properties obtained through Gaia DR3
astrometry and photometry.
  Methods. We started by identifying post-AGB stars or possible candidates from
the bibliography with their Gaia DR3 counterpart sources. Using the available
photometry, interstellar extinction, literature spectroscopically derived
temperatures or spectral types and parallax-derived distances from Gaia DR3, we
fitted their Spectral Energy Distributions and we estimated their luminosities
and circumstellar extinctions. When compared to models, luminosity values
allowed us to disclose objects that are likely post-AGB stars from other target
types. Their position on the HR diagram allows direct comparison with updated
post-AGB evolutionary tracks and an estimation of their masses and evolutionary
ages.
  Results. We obtained a sample of 69 reliable post-AGB candidates that meet
our classification criteria, providing their coordinates, distances, effective
temperature, total extinction, luminosity, mass, and evolutionary age. In
addition, similar data for other stellar objects in our initial compilation,
such as supergiant stars or young stellar objects, is provided.
  Conclusions. We have filtered out the data that have the best precision in
parallaxes and distances to obtain more accurate luminosities, which allows us
to classify with confidence the objects of the sample among different stellar
phases. This allows us to provide a small but reliable sample of post-AGB
objects. Derived mean evolutionary time and average mass values are in
agreement with theoretical expectations.
