Overview of light-weighted mean ages (upper panel), metallicities (central panel), and [α/Fe] abundances (lower panel) in the nuclear discs (blue circles), nuclear rings (orange triangles), and outside of the central regions (green square). The light-weighted averages are calculated in the radial range from 0.1 R_kin to 0.7 R_kin for the nuclear discs, 0.8 R_kin to 1.2 R_kin for the nuclear rings, and 2.0 R_kin to 3.0 R_kin for the surrounding regions. The non-star-forming subsample is displayed in the left, separated by a vertical line from the galaxies in the star-forming subsample. As no kinematic radius could be determined for NGC 1291, this galaxy is not included in this plot.