The “theses of Alcalá” were two controversial statements defended by certain Jesuits at the University of Alcalá de Henares in 1601. One of them was perceived by the Pope as particularly offensive: “It does not belong to Faith that this concrete man, for example, Clement VIII, is the Roman Pontiff”. When Pope Clement learned of this theological act, the Spanish Inquisition intervened, since it attempted to prevent the Supreme Pontiff from reserving the cause for himself. In this article, we delve into these events thanks to several hitherto unpublished manuscripts. Among these documents we highlight several by F. Peña, a Spaniard who interpreted this statement as a subterfuge by the Society of Jesus to avoid the supposedly imminent condemna...