Aspectos teológicos de la ley penal mixta: relación entre la misericordia divina y la pena jurídica en Alfonso de Castro

Alfonso de Castro is one of the fundamental pillars of the Salamanca School legal science. He stands out specially for his work on the penal law and his pioneering observations on a juridical modern science of the criminal law. But also, Alfonso de Castro stood out for your preaching skills and activity. We have two collections of sermons, one of this dedicated to comment the Psalm 50: Miserere domini. In this paper we present the relationship between the theological concept of divine mercy and sacrament of Penance, and the legal penalty on Alfonso de Castro, given that he is a theologian: a theologian that preaching and a jurist theologian. For this elaboration Alfonso de Castro take into account the Franciscan tradition and the problem of the Reform.