  We present an open-access database which includes a synthetic catalog of
black holes in the Milky Way. To calculate evolution of single and binary stars
we used updated population synthesis code StarTrack. We applied a new model of
star formation history and chemical evolution of Galactic disk, bulge and halo
synthesized from observational and theoretical data. We find that at the
current moment Milky Way (disk+bulge+halo) contains about 1.2 x 10^8 single
black holes with average mass of about 14 Msun and 9.3 x 10^6 BHs in binary
systems with average mass of 19 Msun. We present basic statistical properties
of BH populations such as distributions of single and binary BH masses,
velocities, orbital parameters or numbers of BH binary systems in different
evolutionary configurations. We find that the most massive BHs are formed in
mergers of binary systems, such as BH-MS, BH+He, BH-BH. The metallicity of
stellar population has a significant impact on the final BH mass due to the
stellar winds. Therefore the most massive single BH in our simulation, 113
Msun, originates from a merger of a helium star and a black hole in a low
metallicity stellar environment in Galactic halo. The most massive BH in binary
system is 60 Msun and was also formed in Galactic halo. We constrain that only
0.006% of total Galactic halo mass (including dark matter) could be hidden in
the form of stellar origin BHs which are not detectable by current
observational surveys. Galactic binary BHs are minority (10% of all Galactic
BHs) and most of them are in BH-BH systems. The current Galactic merger rates
for two considered common envelope models which are: 3-81 Myr^-1 for BH-BH, 1-9
Myr^-1, for BH-NS and 14-59 Myr^-1 for NS-NS systems. Data files are available
at https://bhc.syntheticuniverse.org/.
