Histograms of the physical parameters of the templates created using the BC16 models. Top panels: distribution of, from left to right, model age, i.e. age since the birth of the simulated galaxy, metallicity, rate of decay of star formation (τ), and time since the bulk of the star formation (t_mod/τ). Bottom panels: histograms of mwa and uwa, sSFR, and effective dust attenuation (A_V). See the main text for more details on the distribution of these parameters.