Kinematical Signatures of Disc Instabilities and Secular Evolution in
  the MUSE TIMER Survey
  The MUSE TIMER Survey has obtained high signal and high spatial resolution
integral-field spectroscopy data of the inner $\sim6\times6$ kpc of 21 nearby
massive disc galaxies. This allows studies of the stellar kinematics of the
central regions of massive disc galaxies that are unprecedented in spatial
resolution. We confirm previous predictions from numerical and hydrodynamical
simulations of the effects of bars and inner bars on stellar and gaseous
kinematics, and also identify box/peanuts via kinematical signatures in mildly
and moderately inclined galaxies, including a box/peanut in a face-on inner
bar. In 20/21 galaxies we find inner discs and show that their properties are
fully consistent with the bar-driven secular evolution picture for their
formation. In addition, we show that these inner discs have, in the region
where they dominate, larger rotational support than the main galaxy disc, and
discuss how their stellar population properties can be used to estimate when in
cosmic history the main bar formed. Our results are compared with photometric
studies in the context of the nature of galaxy bulges and we show that inner
discs are identified in image decompositions as photometric bulges with
exponential profiles (i.e., S\'ersic indices near unity).
