Alfonso de Castro

Alfonso de Castro, O.F.M., known also as Alphonsus à Castro, was a Franciscan theologian and jurist. He belongs to the group of theologian-jurists known as the School of Salamanca, though he denied belonging to a specific school of thought and condemned many theologians who did. He was most well-known in the sixteenth century for his work Adversus omnes haereses, libri XIV, an encyclopedic treatise on ancient and modern heresies.