<p>Research on rock art conducted during the last several decades has shown the skill and knowledge demonstrated by the painters, engravers and sculptors who executed the motifs on rock surfaces and supports. Some motif sets required their creators to acquire a strong graphic command while workmanship techniques have very often proved to be more complex than previously assumed, including for remote periods. It also appears that the motifs have been placed according to specific criteria in connection with spatial orientation or support shape, for instance. The aim of this volume is to question these aesthetic productions with the conceptual tools of art history. How were the techniques used put to the service of the aesthetic project? How can the iconographic study and the stylistic analysis contribute to the understanding of the decorated site? Can we approach the 'short time' of the realisation of cave or rock art sets? Is it possible to target regional particularisms? These are some ofthe questions to which current investigation techniques may give some fresh insight.</p>