In the context of the early centuries of Christianity, in an era dominated by the Roman Empire and marked by severe persecutions against the disciples of Christ, the figure of Saint Firmin emerges, venerated as both Bishop and martyr. His memory is particularly rooted in Spain and France where his example has nourished the faith of entire generations. The account of his life lies between tradition and historical reality, sketching the portrait of a steadfast man, animated by unshakable faith and a profound missionary spirit.