Henri Grouès, known as Abbé Pierre, had a life of commitments: youth among the Capuchins, resistant during the Second World War, then deputy for Meurthe-et-Moselle. The creation of Emmaus will mark the beginning of its fight against social inequalities, its appeal launched during the difficult winter of 54 will have a resounding echo in our society. This retrospective retraces the life of Abbé Pierre, archives and testimonies show it on all fronts of the fight against misery and injustice, for the support of the poorly housed, the excluded.