The year 2010 marks the one-hundredth anniversary of the Recherches de Science Religieuse and provides an opportunity for the journal to explore its past, present, and prospects for the twenty-first century. In order to celebrate the event, this special commemorative issue calls upon authors from many different fields. 'Commemoration' involves not only examining the past, however rich it may be, but also taking up the challenge of analyzing the present and reflecting upon the future. In the first section, diverse approaches ' theological, sociological or historical ' are applied to an in-depth diagnosis of the present. The second part is dedicated to memory: the founding years during the modernist crisis and the major stages in the development of the journal under various directors until today, among them, Henri de Lubac and Joseph Moingt. Finally, this special issue is rounded off by a series of broad perspectives tracing out paths for the future of the disciplines at the heart of theology and religious science today, thus remaining faithful to the journal's original mission of 'research in movement'.