Book excerpt: This interdisciplinary volume originates from talks given at the international conference "Memory and Memories in Early Christianity", held at the Universities of Lausanne and Geneva in June 2016. Exploring a fresh problem in the study of the origins of Christianity and of the New Testament, namely the "work of memory" undertaken in the discourses and practices of the believers in Jesus, these studies not only apply a heuristic analytical tool - "social memory theory" - to the literature and history of Christian beginnings, but also endeavour to show the socio-religious resonance of this "work of memory" in the language and ideology of the first believers.