2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/7015In this brief overview of the stellar populations of galaxies in clusters I highlight some of the most recent results, including the downsizing of the k+a population and the star formation--local density relation. I conclude discussing some open questions regarding the interpretation of the observational results, and speculating on the current meaning of the words ``primordial'' and ``environmental''.6 pages, 2 postscript figures - Invited review at the IAU Joint Discussion n.10 in Sydney, to appear in "Highlights of Astronomy", vol.13, IAU 2003Astrophysicstext