Many breakthroughs and impulses of authentic Christianity have come and continue to come from France. The social worker Madeleine Delbrêl (1904-1964) from Ivry, in the Paris ring, exemplifies how much these local initiatives have also influenced the global church. Her life journey demonstrates how convincingly one can live out Christianity today. It was not words and teachings that shaped her life's work, but missionary presence: she lived side by side with the poor, unafraid of engaging with Marxists. The central theological place for being Christian is everyday life - here the power of the resurrection and the added value of the Gospel are revealed. Fifty years after Madeleine Delbrêl's death, her actions and writings are more relevant than ever - for the art of living and shaping the world. This is what the contributions documented in this volume from a conference commemorating her 50th anniversary of death aim to explore.