The aim of this paper is to sketch the major aspects of Gestaltpsychologie: Wertheimer‘s factors, global v. local factors, isomorphism, auto-organisation, Prägnanz as singularity and as a tendency towards stability. While Gestaltpsychologie as a school no longer exists, its lesson is yet seminal and can inspire many developments of contemporary cognitive psychology. Few examples are here illustrated: geometric psychology, non linear systems (mainly synergetics), and computational gestalts.