Résumé :
Early-type galaxies seem to come in two broad flavours, the so-called slow-
and fast-rotators, the former tending on average to be more massive and having
kinematically decoupled cores and/or velocity twists, the latter exhibiting
regular kinematics consistent with axisymmetric systems with (or without) bars
An important step has now been taken with the ambitious ATLAS3D project
which combines a unique dataset probing a complete, volume limited
(D $<$ 41 Mpc), sample of 261 nearby early-type galaxies, and includes
multi-band photometry, integral-field spectroscopy, radio and millimeter
observations and state-of-the-art numerical simulations and modelling.
In this context, I will present the main results from ATLAS3D, mentioning
what we have learned from the dynamical status, stellar populations
and star formation history, role of the environment, molecular, neutral
and ionised gas content, dark matter component, both from the observations
and models/simulations, further lifting the veil on the true complexity
of early-type galaxies.
